diff --git a/pubsub/api/composer.json b/pubsub/api/composer.json
index 1a54131668..bb4bff3e68 100644
--- a/pubsub/api/composer.json
+++ b/pubsub/api/composer.json
@@ -23,7 +23,7 @@
   },
   "require": {
     "php": ">=5.4",
-    "google/cloud-pubsub": "^0.2",
+    "google/cloud-pubsub": "^0.5",
     "symfony/console": " ^3.0"
   },
   "require-dev": {
diff --git a/pubsub/api/composer.lock b/pubsub/api/composer.lock
index 1c3032385a..011c9ec923 100644
--- a/pubsub/api/composer.lock
+++ b/pubsub/api/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
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-    "content-hash": "ca68b7246dc3d81aafb01f41a68896d5",
+    "content-hash": "c18fbbf5e6916a4b0e0d2376365c28a9",
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             "name": "firebase/php-jwt",
@@ -99,16 +99,16 @@
         },
         {
             "name": "google/cloud-core",
-            "version": "v1.0.0",
+            "version": "v1.5.1",
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                 "type": "git",
                 "url": "https://github.com/GoogleCloudPlatform/google-cloud-php-core.git",
-                "reference": "7a209c6ff0cd92a5ef028c81589415c9e3e4d05b"
+                "reference": "145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9"
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-                "reference": "7a209c6ff0cd92a5ef028c81589415c9e3e4d05b",
+                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-core/zipball/145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9",
+                "reference": "145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9",
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             },
             "require": {
@@ -120,6 +120,9 @@
                 "psr/http-message": "1.0.*",
                 "rize/uri-template": "~0.3"
             },
+            "suggest": {
+                "symfony/lock": "Required for the Spanner cached based session pool. Please require the following commit: 3.3.x-dev#1ba6ac9"
+            },
             "type": "library",
             "extra": {
                 "component": {
@@ -139,20 +142,20 @@
                 "Apache-2.0"
             ],
             "description": "Google Cloud PHP shared dependency, providing functionality useful to all components.",
-            "time": "2017-03-31T16:47:15+00:00"
+            "time": "2017-05-25T15:15:05+00:00"
         },
         {
             "name": "google/cloud-pubsub",
-            "version": "v0.2.0",
+            "version": "v0.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/GoogleCloudPlatform/google-cloud-php-pubsub.git",
-                "reference": "4da64997916a2d7a49f889277fd42b3874dd77f4"
+                "reference": "5d647b2c3cf571fa3a400603179685a82a6cd076"
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-                "reference": "4da64997916a2d7a49f889277fd42b3874dd77f4",
+                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-pubsub/zipball/5d647b2c3cf571fa3a400603179685a82a6cd076",
+                "reference": "5d647b2c3cf571fa3a400603179685a82a6cd076",
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@@ -181,7 +184,7 @@
                 "Apache-2.0"
             ],
             "description": "Cloud PubSub Client for PHP",
-            "time": "2017-03-31T16:47:15+00:00"
+            "time": "2017-05-22T16:18:33+00:00"
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             "name": "guzzlehttp/guzzle",
@@ -628,16 +631,16 @@
         },
         {
             "name": "symfony/console",
-            "version": "v3.2.7",
+            "version": "v3.3.2",
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                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "c30243cc51f726812be3551316b109a2f5deaf8d"
+                "reference": "70d2a29b2911cbdc91a7e268046c395278238b2e"
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-                "reference": "c30243cc51f726812be3551316b109a2f5deaf8d",
+                "url": "https://api.github.com/repos/symfony/console/zipball/70d2a29b2911cbdc91a7e268046c395278238b2e",
+                "reference": "70d2a29b2911cbdc91a7e268046c395278238b2e",
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@@ -645,10 +648,16 @@
                 "symfony/debug": "~2.8|~3.0",
                 "symfony/polyfill-mbstring": "~1.0"
             },
+            "conflict": {
+                "symfony/dependency-injection": "<3.3"
+            },
             "require-dev": {
                 "psr/log": "~1.0",
+                "symfony/config": "~3.3",
+                "symfony/dependency-injection": "~3.3",
                 "symfony/event-dispatcher": "~2.8|~3.0",
                 "symfony/filesystem": "~2.8|~3.0",
+                "symfony/http-kernel": "~2.8|~3.0",
                 "symfony/process": "~2.8|~3.0"
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@@ -660,7 +669,7 @@
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             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.3-dev"
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@@ -687,20 +696,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-04-04T14:33:42+00:00"
+            "time": "2017-06-02T19:24:58+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v3.2.7",
+            "version": "v3.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
-                "reference": "56f613406446a4a0a031475cfd0a01751de22659"
+                "reference": "e9c50482841ef696e8fa1470d950a79c8921f45d"
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-                "reference": "56f613406446a4a0a031475cfd0a01751de22659",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/e9c50482841ef696e8fa1470d950a79c8921f45d",
+                "reference": "e9c50482841ef696e8fa1470d950a79c8921f45d",
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@@ -711,13 +720,12 @@
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             },
             "require-dev": {
-                "symfony/class-loader": "~2.8|~3.0",
                 "symfony/http-kernel": "~2.8|~3.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.3-dev"
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@@ -744,20 +752,20 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-03-28T21:38:24+00:00"
+            "time": "2017-06-01T21:01:25+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.3.0",
+            "version": "v1.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "e79d363049d1c2128f133a2667e4f4190904f7f4"
+                "reference": "f29dca382a6485c3cbe6379f0c61230167681937"
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-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/e79d363049d1c2128f133a2667e4f4190904f7f4",
-                "reference": "e79d363049d1c2128f133a2667e4f4190904f7f4",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/f29dca382a6485c3cbe6379f0c61230167681937",
+                "reference": "f29dca382a6485c3cbe6379f0c61230167681937",
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@@ -769,7 +777,7 @@
             "type": "library",
             "extra": {
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-                    "dev-master": "1.3-dev"
+                    "dev-master": "1.4-dev"
                 }
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@@ -803,7 +811,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-11-14T01:06:16+00:00"
+            "time": "2017-06-09T14:24:12+00:00"
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     "packages-dev": [
@@ -1512,23 +1520,23 @@
         },
         {
             "name": "sebastian/diff",
-            "version": "1.4.1",
+            "version": "1.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/diff.git",
-                "reference": "13edfd8706462032c2f52b4b862974dd46b71c9e"
+                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4"
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-                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/13edfd8706462032c2f52b4b862974dd46b71c9e",
-                "reference": "13edfd8706462032c2f52b4b862974dd46b71c9e",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/7f066a26a962dbe58ddea9f72a4e82874a3975a4",
+                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": "^5.3.3 || ^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.8"
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
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             "extra": {
@@ -1560,7 +1568,7 @@
             "keywords": [
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             ],
-            "time": "2015-12-08T07:14:41+00:00"
+            "time": "2017-05-22T07:24:03+00:00"
         },
         {
             "name": "sebastian/environment",
@@ -1820,16 +1828,16 @@
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.2.7",
+            "version": "v3.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "62b4cdb99d52cb1ff253c465eb1532a80cebb621"
+                "reference": "9752a30000a8ca9f4b34b5227d15d0101b96b063"
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-                "reference": "62b4cdb99d52cb1ff253c465eb1532a80cebb621",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/9752a30000a8ca9f4b34b5227d15d0101b96b063",
+                "reference": "9752a30000a8ca9f4b34b5227d15d0101b96b063",
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@@ -1844,7 +1852,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.3-dev"
                 }
             },
             "autoload": {
@@ -1871,7 +1879,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-03-20T09:45:15+00:00"
+            "time": "2017-06-02T22:05:06+00:00"
         },
         {
             "name": "webmozart/assert",
diff --git a/pubsub/app/composer.json b/pubsub/app/composer.json
index f6cb1671a5..d821f56a8f 100644
--- a/pubsub/app/composer.json
+++ b/pubsub/app/composer.json
@@ -1,7 +1,7 @@
 {
   "require": {
     "php": ">=5.4",
-    "google/cloud-pubsub": "^0.2",
+    "google/cloud-pubsub": "^0.5",
     "google/cloud-datastore": "^1.0",
     "silex/silex": "~1.3",
     "symfony/twig-bridge": "~2.7|3.0.*",
diff --git a/pubsub/app/composer.lock b/pubsub/app/composer.lock
index 784d15ceb9..54c6c69ca7 100644
--- a/pubsub/app/composer.lock
+++ b/pubsub/app/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "ec1d55a93d1db53efa70465ae9356074",
+    "content-hash": "fa7dc11d8118d544832721e887e21059",
     "packages": [
         {
             "name": "firebase/php-jwt",
@@ -99,16 +99,16 @@
         },
         {
             "name": "google/cloud-core",
-            "version": "v1.0.0",
+            "version": "v1.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/GoogleCloudPlatform/google-cloud-php-core.git",
-                "reference": "7a209c6ff0cd92a5ef028c81589415c9e3e4d05b"
+                "reference": "145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9"
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-                "reference": "7a209c6ff0cd92a5ef028c81589415c9e3e4d05b",
+                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-core/zipball/145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9",
+                "reference": "145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9",
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             },
             "require": {
@@ -120,6 +120,9 @@
                 "psr/http-message": "1.0.*",
                 "rize/uri-template": "~0.3"
             },
+            "suggest": {
+                "symfony/lock": "Required for the Spanner cached based session pool. Please require the following commit: 3.3.x-dev#1ba6ac9"
+            },
             "type": "library",
             "extra": {
                 "component": {
@@ -139,7 +142,7 @@
                 "Apache-2.0"
             ],
             "description": "Google Cloud PHP shared dependency, providing functionality useful to all components.",
-            "time": "2017-03-31T16:47:15+00:00"
+            "time": "2017-05-25T15:15:05+00:00"
         },
         {
             "name": "google/cloud-datastore",
@@ -181,16 +184,16 @@
         },
         {
             "name": "google/cloud-pubsub",
-            "version": "v0.2.0",
+            "version": "v0.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/GoogleCloudPlatform/google-cloud-php-pubsub.git",
-                "reference": "4da64997916a2d7a49f889277fd42b3874dd77f4"
+                "reference": "5d647b2c3cf571fa3a400603179685a82a6cd076"
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-                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-pubsub/zipball/4da64997916a2d7a49f889277fd42b3874dd77f4",
-                "reference": "4da64997916a2d7a49f889277fd42b3874dd77f4",
+                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-pubsub/zipball/5d647b2c3cf571fa3a400603179685a82a6cd076",
+                "reference": "5d647b2c3cf571fa3a400603179685a82a6cd076",
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@@ -219,7 +222,7 @@
                 "Apache-2.0"
             ],
             "description": "Cloud PubSub Client for PHP",
-            "time": "2017-03-31T16:47:15+00:00"
+            "time": "2017-05-22T16:18:33+00:00"
         },
         {
             "name": "guzzlehttp/guzzle",
@@ -712,16 +715,16 @@
         },
         {
             "name": "silex/silex",
-            "version": "v1.3.5",
+            "version": "v1.3.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/silexphp/Silex.git",
-                "reference": "374c7e04040a6f781c90f7d746726a5daa78e783"
+                "reference": "ff8aa6bc2e066e14b07e0c63e9bd9dd1458af136"
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-                "url": "https://api.github.com/repos/silexphp/Silex/zipball/374c7e04040a6f781c90f7d746726a5daa78e783",
-                "reference": "374c7e04040a6f781c90f7d746726a5daa78e783",
+                "url": "https://api.github.com/repos/silexphp/Silex/zipball/ff8aa6bc2e066e14b07e0c63e9bd9dd1458af136",
+                "reference": "ff8aa6bc2e066e14b07e0c63e9bd9dd1458af136",
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@@ -743,7 +746,7 @@
                 "symfony/dom-crawler": "~2.3|3.0.*",
                 "symfony/finder": "~2.3|3.0.*",
                 "symfony/form": "~2.3|3.0.*",
-                "symfony/locale": "~2.3|3.0.*",
+                "symfony/intl": "~2.3|3.0.*",
                 "symfony/monolog-bridge": "~2.3|3.0.*",
                 "symfony/options-resolver": "~2.3|3.0.*",
                 "symfony/phpunit-bridge": "~2.7",
@@ -753,7 +756,7 @@
                 "symfony/translation": "~2.3|3.0.*",
                 "symfony/twig-bridge": "~2.3|3.0.*",
                 "symfony/validator": "~2.3|3.0.*",
-                "twig/twig": "~1.8|~2.0"
+                "twig/twig": "~1.28|~2.0"
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             "extra": {
@@ -785,20 +788,20 @@
             "keywords": [
                 "microframework"
             ],
-            "time": "2016-01-06T14:59:35+00:00"
+            "time": "2017-04-30T16:26:54+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v3.2.7",
+            "version": "v3.3.2",
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                 "url": "https://github.com/symfony/debug.git",
-                "reference": "56f613406446a4a0a031475cfd0a01751de22659"
+                "reference": "e9c50482841ef696e8fa1470d950a79c8921f45d"
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-                "reference": "56f613406446a4a0a031475cfd0a01751de22659",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/e9c50482841ef696e8fa1470d950a79c8921f45d",
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@@ -809,13 +812,12 @@
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             },
             "require-dev": {
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                 "symfony/http-kernel": "~2.8|~3.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.3-dev"
                 }
             },
             "autoload": {
@@ -842,7 +844,7 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-03-28T21:38:24+00:00"
+            "time": "2017-06-01T21:01:25+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
@@ -1041,16 +1043,16 @@
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.3.0",
+            "version": "v1.4.0",
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                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "e79d363049d1c2128f133a2667e4f4190904f7f4"
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-                "reference": "e79d363049d1c2128f133a2667e4f4190904f7f4",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/f29dca382a6485c3cbe6379f0c61230167681937",
+                "reference": "f29dca382a6485c3cbe6379f0c61230167681937",
                 "shasum": ""
             },
             "require": {
@@ -1062,7 +1064,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.3-dev"
+                    "dev-master": "1.4-dev"
                 }
             },
             "autoload": {
@@ -1096,7 +1098,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-11-14T01:06:16+00:00"
+            "time": "2017-06-09T14:24:12+00:00"
         },
         {
             "name": "symfony/routing",
@@ -1256,20 +1258,20 @@
         },
         {
             "name": "twig/twig",
-            "version": "v1.33.0",
+            "version": "v1.34.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/twigphp/Twig.git",
-                "reference": "05cf49921b13f6f01d3cfdf9018cfa7a8086fd5a"
+                "reference": "451c6f4197e113e24c1c85bc3fc8c2d77adeff2e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/twigphp/Twig/zipball/05cf49921b13f6f01d3cfdf9018cfa7a8086fd5a",
-                "reference": "05cf49921b13f6f01d3cfdf9018cfa7a8086fd5a",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/451c6f4197e113e24c1c85bc3fc8c2d77adeff2e",
+                "reference": "451c6f4197e113e24c1c85bc3fc8c2d77adeff2e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.2.7"
+                "php": ">=5.3.3"
             },
             "require-dev": {
                 "psr/container": "^1.0",
@@ -1279,12 +1281,15 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.33-dev"
+                    "dev-master": "1.34-dev"
                 }
             },
             "autoload": {
                 "psr-0": {
                     "Twig_": "lib/"
+                },
+                "psr-4": {
+                    "Twig\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -1314,7 +1319,7 @@
             "keywords": [
                 "templating"
             ],
-            "time": "2017-03-22T15:40:09+00:00"
+            "time": "2017-06-07T18:45:17+00:00"
         }
     ],
     "packages-dev": [
@@ -2121,23 +2126,23 @@
         },
         {
             "name": "sebastian/diff",
-            "version": "1.4.1",
+            "version": "1.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/diff.git",
-                "reference": "13edfd8706462032c2f52b4b862974dd46b71c9e"
+                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/13edfd8706462032c2f52b4b862974dd46b71c9e",
-                "reference": "13edfd8706462032c2f52b4b862974dd46b71c9e",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/7f066a26a962dbe58ddea9f72a4e82874a3975a4",
+                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": "^5.3.3 || ^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.8"
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
             },
             "type": "library",
             "extra": {
@@ -2169,7 +2174,7 @@
             "keywords": [
                 "diff"
             ],
-            "time": "2015-12-08T07:14:41+00:00"
+            "time": "2017-05-22T07:24:03+00:00"
         },
         {
             "name": "sebastian/environment",
@@ -2429,16 +2434,16 @@
         },
         {
             "name": "symfony/browser-kit",
-            "version": "v2.8.19",
+            "version": "v2.8.22",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/browser-kit.git",
-                "reference": "8827db04bcd8d9b9bf3114ea41081d8036ab209c"
+                "reference": "4386755566fc8d29bddf89694663b0e96cb01e61"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/browser-kit/zipball/8827db04bcd8d9b9bf3114ea41081d8036ab209c",
-                "reference": "8827db04bcd8d9b9bf3114ea41081d8036ab209c",
+                "url": "https://api.github.com/repos/symfony/browser-kit/zipball/4386755566fc8d29bddf89694663b0e96cb01e61",
+                "reference": "4386755566fc8d29bddf89694663b0e96cb01e61",
                 "shasum": ""
             },
             "require": {
@@ -2482,7 +2487,7 @@
             ],
             "description": "Symfony BrowserKit Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-02-21T08:33:48+00:00"
+            "time": "2017-04-12T14:07:15+00:00"
         },
         {
             "name": "symfony/dom-crawler",
@@ -2542,16 +2547,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v3.2.7",
+            "version": "v3.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "57fdaa55827ae14d617550ebe71a820f0a5e2282"
+                "reference": "8e30690c67aafb6c7992d6d8eb0d707807dd3eaf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/57fdaa55827ae14d617550ebe71a820f0a5e2282",
-                "reference": "57fdaa55827ae14d617550ebe71a820f0a5e2282",
+                "url": "https://api.github.com/repos/symfony/process/zipball/8e30690c67aafb6c7992d6d8eb0d707807dd3eaf",
+                "reference": "8e30690c67aafb6c7992d6d8eb0d707807dd3eaf",
                 "shasum": ""
             },
             "require": {
@@ -2560,7 +2565,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.3-dev"
                 }
             },
             "autoload": {
@@ -2587,20 +2592,20 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-03-27T18:07:02+00:00"
+            "time": "2017-05-22T12:32:03+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.2.7",
+            "version": "v3.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "62b4cdb99d52cb1ff253c465eb1532a80cebb621"
+                "reference": "9752a30000a8ca9f4b34b5227d15d0101b96b063"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/62b4cdb99d52cb1ff253c465eb1532a80cebb621",
-                "reference": "62b4cdb99d52cb1ff253c465eb1532a80cebb621",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/9752a30000a8ca9f4b34b5227d15d0101b96b063",
+                "reference": "9752a30000a8ca9f4b34b5227d15d0101b96b063",
                 "shasum": ""
             },
             "require": {
@@ -2615,7 +2620,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.3-dev"
                 }
             },
             "autoload": {
@@ -2642,7 +2647,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-03-20T09:45:15+00:00"
+            "time": "2017-06-02T22:05:06+00:00"
         },
         {
             "name": "webmozart/assert",
diff --git a/pubsub/app/test/DeployAppEngineFlexTest.php b/pubsub/app/test/DeployAppEngineFlexTest.php
index 10c3cbc8e2..ae6121c567 100644
--- a/pubsub/app/test/DeployAppEngineFlexTest.php
+++ b/pubsub/app/test/DeployAppEngineFlexTest.php
@@ -23,7 +23,7 @@ class DeployAppEngineFlexTest extends \PHPUnit_Framework_TestCase
 {
     use AppEngineDeploymentTrait;
 
-    public function beforeDeploy()
+    public static function beforeDeploy()
     {
         $tmpDir = FileUtil::cloneDirectoryIntoTmp(__DIR__ . '/..');
         copy(__DIR__ . '/../app.yaml.flexible', $tmpDir . '/app.yaml');
diff --git a/pubsub/quickstart/composer.json b/pubsub/quickstart/composer.json
index 137bf1af28..21f3d8b8b0 100644
--- a/pubsub/quickstart/composer.json
+++ b/pubsub/quickstart/composer.json
@@ -1,7 +1,7 @@
 {
     "require": {
         "php": ">=5.4",
-        "google/cloud-pubsub": "^0.2"
+        "google/cloud-pubsub": "^0.5"
     },
     "require-dev": {
         "phpunit/phpunit": "~4"
diff --git a/pubsub/quickstart/composer.lock b/pubsub/quickstart/composer.lock
index 9fef4b3afb..cda7878d28 100644
--- a/pubsub/quickstart/composer.lock
+++ b/pubsub/quickstart/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "32408b559a46a6aa6ed2cb4695c3ef66",
+    "content-hash": "2f6fc235b61eb520d33ce75c89fd8e7f",
     "packages": [
         {
             "name": "firebase/php-jwt",
@@ -99,16 +99,16 @@
         },
         {
             "name": "google/cloud-core",
-            "version": "v1.0.0",
+            "version": "v1.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/GoogleCloudPlatform/google-cloud-php-core.git",
-                "reference": "7a209c6ff0cd92a5ef028c81589415c9e3e4d05b"
+                "reference": "145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-core/zipball/7a209c6ff0cd92a5ef028c81589415c9e3e4d05b",
-                "reference": "7a209c6ff0cd92a5ef028c81589415c9e3e4d05b",
+                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-core/zipball/145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9",
+                "reference": "145cc80d8eeb03ad677733ca2a5a9bcf4fc3def9",
                 "shasum": ""
             },
             "require": {
@@ -120,6 +120,9 @@
                 "psr/http-message": "1.0.*",
                 "rize/uri-template": "~0.3"
             },
+            "suggest": {
+                "symfony/lock": "Required for the Spanner cached based session pool. Please require the following commit: 3.3.x-dev#1ba6ac9"
+            },
             "type": "library",
             "extra": {
                 "component": {
@@ -139,20 +142,20 @@
                 "Apache-2.0"
             ],
             "description": "Google Cloud PHP shared dependency, providing functionality useful to all components.",
-            "time": "2017-03-31T16:47:15+00:00"
+            "time": "2017-05-25T15:15:05+00:00"
         },
         {
             "name": "google/cloud-pubsub",
-            "version": "v0.2.0",
+            "version": "v0.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/GoogleCloudPlatform/google-cloud-php-pubsub.git",
-                "reference": "4da64997916a2d7a49f889277fd42b3874dd77f4"
+                "reference": "5d647b2c3cf571fa3a400603179685a82a6cd076"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-pubsub/zipball/4da64997916a2d7a49f889277fd42b3874dd77f4",
-                "reference": "4da64997916a2d7a49f889277fd42b3874dd77f4",
+                "url": "https://api.github.com/repos/GoogleCloudPlatform/google-cloud-php-pubsub/zipball/5d647b2c3cf571fa3a400603179685a82a6cd076",
+                "reference": "5d647b2c3cf571fa3a400603179685a82a6cd076",
                 "shasum": ""
             },
             "require": {
@@ -181,7 +184,7 @@
                 "Apache-2.0"
             ],
             "description": "Cloud PubSub Client for PHP",
-            "time": "2017-03-31T16:47:15+00:00"
+            "time": "2017-05-22T16:18:33+00:00"
         },
         {
             "name": "guzzlehttp/guzzle",
@@ -1333,23 +1336,23 @@
         },
         {
             "name": "sebastian/diff",
-            "version": "1.4.1",
+            "version": "1.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/diff.git",
-                "reference": "13edfd8706462032c2f52b4b862974dd46b71c9e"
+                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/13edfd8706462032c2f52b4b862974dd46b71c9e",
-                "reference": "13edfd8706462032c2f52b4b862974dd46b71c9e",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/7f066a26a962dbe58ddea9f72a4e82874a3975a4",
+                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": "^5.3.3 || ^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.8"
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
             },
             "type": "library",
             "extra": {
@@ -1381,7 +1384,7 @@
             "keywords": [
                 "diff"
             ],
-            "time": "2015-12-08T07:14:41+00:00"
+            "time": "2017-05-22T07:24:03+00:00"
         },
         {
             "name": "sebastian/environment",
@@ -1641,16 +1644,16 @@
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.2.7",
+            "version": "v3.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "62b4cdb99d52cb1ff253c465eb1532a80cebb621"
+                "reference": "9752a30000a8ca9f4b34b5227d15d0101b96b063"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/62b4cdb99d52cb1ff253c465eb1532a80cebb621",
-                "reference": "62b4cdb99d52cb1ff253c465eb1532a80cebb621",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/9752a30000a8ca9f4b34b5227d15d0101b96b063",
+                "reference": "9752a30000a8ca9f4b34b5227d15d0101b96b063",
                 "shasum": ""
             },
             "require": {
@@ -1665,7 +1668,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.3-dev"
                 }
             },
             "autoload": {
@@ -1692,7 +1695,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com/",
-            "time": "2017-03-20T09:45:15+00:00"
+            "time": "2017-06-02T22:05:06+00:00"
         },
         {
             "name": "webmozart/assert",