diff --git a/visionSamples/FaceTracker/app/build.gradle b/visionSamples/FaceTracker/app/build.gradle
index d40e40d8..d9a9fa80 100644
--- a/visionSamples/FaceTracker/app/build.gradle
+++ b/visionSamples/FaceTracker/app/build.gradle
@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.2"
+    compileSdkVersion 28
+    buildToolsVersion "24.0.3"
 
     defaultConfig {
         applicationId "com.google.android.gms.samples.vision.face.facetracker"
-        minSdkVersion 9
-        targetSdkVersion 24
+        minSdkVersion 19
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
     }
@@ -20,8 +20,8 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:support-v4:24.2.0'
-    compile 'com.android.support:design:24.2.0'
-    compile 'com.google.android.gms:play-services-vision:9.4.0+'
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:support-v4:28.0.0'
+    implementation 'com.android.support:design:28.0.0'
 }
+apply plugin: 'com.google.gms.google-services'
\ No newline at end of file
diff --git a/visionSamples/FaceTracker/app/src/main/AndroidManifest.xml b/visionSamples/FaceTracker/app/src/main/AndroidManifest.xml
index 91fa7354..e30d5d67 100644
--- a/visionSamples/FaceTracker/app/src/main/AndroidManifest.xml
+++ b/visionSamples/FaceTracker/app/src/main/AndroidManifest.xml
@@ -9,9 +9,7 @@
 
     <uses-permission android:name="android.permission.CAMERA" />
 
-    <uses-sdk
-        android:minSdkVersion="9"
-        android:targetSdkVersion="23" />
+
 
     <application
         android:allowBackup="true"
diff --git a/visionSamples/FaceTracker/build.gradle b/visionSamples/FaceTracker/build.gradle
index d14039de..7846cefa 100644
--- a/visionSamples/FaceTracker/build.gradle
+++ b/visionSamples/FaceTracker/build.gradle
@@ -3,10 +3,11 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
-
+        classpath 'com.android.tools.build:gradle:3.4.0'
+        classpath 'com.google.gms:google-services:4.2.0'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -14,6 +15,11 @@ buildscript {
 
 allprojects {
     repositories {
+        google()
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+        }
+
     }
 }
diff --git a/visionSamples/barcode-reader/build.gradle b/visionSamples/barcode-reader/build.gradle
index d14039de..5e543a33 100644
--- a/visionSamples/barcode-reader/build.gradle
+++ b/visionSamples/barcode-reader/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/visionSamples/googly-eyes/build.gradle b/visionSamples/googly-eyes/build.gradle
index d14039de..5e543a33 100644
--- a/visionSamples/googly-eyes/build.gradle
+++ b/visionSamples/googly-eyes/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/visionSamples/multi-tracker/build.gradle b/visionSamples/multi-tracker/build.gradle
index d14039de..5e543a33 100644
--- a/visionSamples/multi-tracker/build.gradle
+++ b/visionSamples/multi-tracker/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/visionSamples/ocr-codelab/ocr-reader-complete/build.gradle b/visionSamples/ocr-codelab/ocr-reader-complete/build.gradle
index c06df431..bd51566b 100644
--- a/visionSamples/ocr-codelab/ocr-reader-complete/build.gradle
+++ b/visionSamples/ocr-codelab/ocr-reader-complete/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/visionSamples/ocr-codelab/ocr-reader-start/build.gradle b/visionSamples/ocr-codelab/ocr-reader-start/build.gradle
index c06df431..bd51566b 100644
--- a/visionSamples/ocr-codelab/ocr-reader-start/build.gradle
+++ b/visionSamples/ocr-codelab/ocr-reader-start/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/visionSamples/ocr-reader/build.gradle b/visionSamples/ocr-reader/build.gradle
index ea98e44f..5e543a33 100644
--- a/visionSamples/ocr-reader/build.gradle
+++ b/visionSamples/ocr-reader/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.2'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/visionSamples/photo-demo/build.gradle b/visionSamples/photo-demo/build.gradle
index d14039de..5e543a33 100644
--- a/visionSamples/photo-demo/build.gradle
+++ b/visionSamples/photo-demo/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files