diff --git a/composer.json b/composer.json
index 142a2c2e0..dc1e5c3d6 100644
--- a/composer.json
+++ b/composer.json
@@ -1,60 +1,60 @@
-{
-    "name": "jenssegers/mongodb",
-    "description": "A MongoDB based Eloquent model and Query builder for Laravel (Moloquent)",
-    "keywords": [
-        "laravel",
-        "eloquent",
-        "mongodb",
-        "mongo",
-        "database",
-        "model",
-        "moloquent"
-    ],
-    "homepage": "https://github.com/jenssegers/laravel-mongodb",
-    "authors": [
-        {
-            "name": "Jens Segers",
-            "homepage": "https://jenssegers.com/"
-        }
-    ],
-    "license": "MIT",
-    "require": {
-        "illuminate/support": "^5.8|^6.0",
-        "illuminate/container": "^5.8|^6.0",
-        "illuminate/database": "^5.8|^6.0",
-        "illuminate/events": "^5.8|^6.0",
-        "mongodb/mongodb": "^1.4"
-    },
-    "require-dev": {
-        "phpunit/phpunit": "^6.0|^7.0|^8.0",
-        "orchestra/testbench": "^3.1|^4.0",
-        "mockery/mockery": "^1.0",
-        "doctrine/dbal": "^2.5",
-        "phpunit/phpcov": "^6.0",
-        "cedx/coveralls": "^11.2"
-    },
-    "autoload": {
-        "psr-0": {
-            "Jenssegers\\Mongodb": "src/"
-        }
-    },
-    "autoload-dev": {
-        "classmap": [
-            "tests/TestCase.php",
-            "tests/models",
-            "tests/seeds"
-        ]
-    },
-    "suggest": {
-        "jenssegers/mongodb-session": "Add MongoDB session support to Laravel-MongoDB",
-        "jenssegers/mongodb-sentry": "Add Sentry support to Laravel-MongoDB"
-    },
-    "extra": {
-        "laravel": {
-            "providers": [
-                "Jenssegers\\Mongodb\\MongodbServiceProvider",
-                "Jenssegers\\Mongodb\\MongodbQueueServiceProvider"
-            ]
-        }
-    }
-}
+{
+    "name": "viitech/laravel-mongodb",
+    "description": "A MongoDB based Eloquent model and Query builder for Laravel (Moloquent)",
+    "keywords": [
+        "laravel",
+        "eloquent",
+        "mongodb",
+        "mongo",
+        "database",
+        "model",
+        "moloquent"
+    ],
+    "homepage": "https://github.com/jenssegers/laravel-mongodb",
+    "authors": [
+        {
+            "name": "Jens Segers",
+            "homepage": "https://jenssegers.com/"
+        }
+    ],
+    "license": "MIT",
+    "require": {
+        "illuminate/support": "^5.8|^6.0",
+        "illuminate/container": "^5.8|^6.0",
+        "illuminate/database": "^5.8|^6.0",
+        "illuminate/events": "^5.8|^6.0",
+        "mongodb/mongodb": "^1.4"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^6.0|^7.0|^8.0",
+        "orchestra/testbench": "^3.1|^4.0",
+        "mockery/mockery": "^1.0",
+        "doctrine/dbal": "^2.5",
+        "phpunit/phpcov": "^6.0",
+        "cedx/coveralls": "^11.2"
+    },
+    "autoload": {
+        "psr-0": {
+            "Jenssegers\\Mongodb": "src/"
+        }
+    },
+    "autoload-dev": {
+        "classmap": [
+            "tests/TestCase.php",
+            "tests/models",
+            "tests/seeds"
+        ]
+    },
+    "suggest": {
+        "jenssegers/mongodb-session": "Add MongoDB session support to Laravel-MongoDB",
+        "jenssegers/mongodb-sentry": "Add Sentry support to Laravel-MongoDB"
+    },
+    "extra": {
+        "laravel": {
+            "providers": [
+                "Jenssegers\\Mongodb\\MongodbServiceProvider",
+                "Jenssegers\\Mongodb\\MongodbQueueServiceProvider"
+            ]
+        }
+    }
+}
diff --git a/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php b/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php
index 151ead62d..0b6915b8f 100644
--- a/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php
+++ b/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php
@@ -167,6 +167,10 @@ protected function getRelatedConstraintKey(Relation $relation)
         if ($relation instanceof BelongsToMany && !$this->isAcrossConnections($relation)) {
             return $this->model->getKeyName();
         }
+        
+        if ($relation instanceof \Jenssegers\Mongodb\Relations\BelongsToMany && ! $this->isAcrossConnections($relation)) {
+            return $this->model->getKeyName();
+        }
 
         throw new Exception(class_basename($relation) . ' is not supported for hybrid query constraints.');
     }