diff --git a/src/Config/Processor/RelayProcessor.php b/src/Config/Processor/RelayProcessor.php
index 16e5edd41..2ded244f4 100644
--- a/src/Config/Processor/RelayProcessor.php
+++ b/src/Config/Processor/RelayProcessor.php
@@ -33,6 +33,9 @@ private static function processRelayConfigs($typeName, $definitionBuilderClass,
     {
         foreach ($configs as $name => $config) {
             if (isset($config['type']) && \is_string($config['type']) && $typeName === $config['type']) {
+                
+                $configInherits = isset($config['inherits']) && \is_array($config['inherits']) ? $config['inherits'] : [];
+                                
                 $config = isset($config['config']) && \is_array($config['config']) ? $config['config'] : [];
 
                 if (empty($config['class_name'])) {
@@ -47,6 +50,10 @@ private static function processRelayConfigs($typeName, $definitionBuilderClass,
 
                 $connectionDefinition = $builder->toMappingDefinition($config);
 
+                if (!empty($configInherits)) {
+                    $connectionDefinition[$name]['inherits'] = $configInherits;
+                }
+                
                 $configs = \array_replace($configs, $connectionDefinition);
             }
         }
diff --git a/tests/Functional/App/config/mutation/mapping/Inputs.types.yml b/tests/Functional/App/config/mutation/mapping/Inputs.types.yml
index 8a660baa1..ef1d4ffcd 100644
--- a/tests/Functional/App/config/mutation/mapping/Inputs.types.yml
+++ b/tests/Functional/App/config/mutation/mapping/Inputs.types.yml
@@ -9,6 +9,14 @@ simpleMutationWithThunkFieldsInput:
         fields:
             inputData : { type: "Int" }
 
+simpleMutationWithInheritanceInput:
+    type: relay-mutation-input
+    inherits:
+        - simpleMutationWithThunkFieldsInput
+    config:
+        fields:
+            moreData : { type: "Int" }
+
 simplePromiseMutationInput:
     type: relay-mutation-input
     config:
diff --git a/tests/Functional/App/config/mutation/mapping/Payloads.types.yml b/tests/Functional/App/config/mutation/mapping/Payloads.types.yml
index 02b61a1b3..6facebf16 100644
--- a/tests/Functional/App/config/mutation/mapping/Payloads.types.yml
+++ b/tests/Functional/App/config/mutation/mapping/Payloads.types.yml
@@ -10,6 +10,14 @@ simpleMutationWithThunkFieldsPayload:
         fields:
             result: { type: "Int" }
 
+simpleMutationWithInheritancePayload:
+    type: relay-mutation-payload
+    inherits:
+        - simpleMutationWithThunkFieldsPayload
+    config:
+        fields:
+            more: { type: "Int" }
+
 simplePromiseMutationPayload:
     type: relay-mutation-payload
     config:
diff --git a/tests/Functional/App/config/mutation/mapping/RootMutation.types.yml b/tests/Functional/App/config/mutation/mapping/RootMutation.types.yml
index 12cd89778..be62555cc 100644
--- a/tests/Functional/App/config/mutation/mapping/RootMutation.types.yml
+++ b/tests/Functional/App/config/mutation/mapping/RootMutation.types.yml
@@ -14,6 +14,12 @@ RootMutation:
                     inputType: simpleMutationWithThunkFieldsInput
                     payloadType: simpleMutationWithThunkFieldsPayload
                     mutateAndGetPayload: "@=mutation('simple_mutation_with_thunk_fields', [value])"
+            simpleMutationWithInheritance:
+                builder: "Relay::Mutation"
+                builderConfig:
+                    inputType: simpleMutationWithInheritanceInput
+                    payloadType: simpleMutationWithInheritancePayload
+                    mutateAndGetPayload: {result: 1234, more: 1337}
             simplePromiseMutation:
                 builder: "Relay::Mutation"
                 builderConfig:
diff --git a/tests/Functional/Relay/Mutation/MutationTest.php b/tests/Functional/Relay/Mutation/MutationTest.php
index 572a0282b..8c2990e4a 100644
--- a/tests/Functional/Relay/Mutation/MutationTest.php
+++ b/tests/Functional/Relay/Mutation/MutationTest.php
@@ -77,6 +77,28 @@ public function testSupportsThunksAsInputAndOutputFields()
         $this->assertGraphQL($query, $expectedData);
     }
 
+    public function testSupportsInheritanceOfInputAndOutputFields()
+    {
+        $query = <<<'EOF'
+mutation M {
+    simpleMutationWithInheritance(input: {inputData: 1234, moreData: 1337, clientMutationId: "abc"}) {
+    result
+    more
+    clientMutationId
+  }
+}
+EOF;
+        $expectedData = [
+            'simpleMutationWithInheritance' => [
+                'result' => 1234,
+                'more' => 1337,
+                'clientMutationId' => 'abc',
+            ],
+        ];
+
+        $this->assertGraphQL($query, $expectedData);
+    }
+
     public function testSupportsPromiseMutations()
     {
         $query = <<<'EOF'
@@ -250,6 +272,26 @@ public function testContainsCorrectField()
                                 'kind' => 'OBJECT',
                             ],
                         ],
+                        [
+                            'name' => 'simpleMutationWithInheritance',
+                            'args' => [
+                                [
+                                    'name' => 'input',
+                                    'type' => [
+                                        'name' => null,
+                                        'kind' => 'NON_NULL',
+                                        'ofType' => [
+                                            'name' => 'simpleMutationWithInheritanceInput',
+                                            'kind' => 'INPUT_OBJECT',
+                                        ],
+                                    ],
+                                ],
+                            ],
+                            'type' => [
+                                'name' => 'simpleMutationWithInheritancePayload',
+                                'kind' => 'OBJECT',
+                            ],
+                        ],
                         [
                             'name' => 'simplePromiseMutation',
                             'args' => [