diff --git a/package-lock.json b/package-lock.json
index 9c2b21e15de..838819cb69c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10061,13 +10061,10 @@
       "integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA=="
     },
     "graphql": {
-      "version": "14.6.0",
-      "resolved": "https://registry.npmjs.org/graphql/-/graphql-14.6.0.tgz",
-      "integrity": "sha512-VKzfvHEKybTKjQVpTFrA5yUq2S9ihcZvfJAtsDBBCuV6wauPu1xl/f9ehgVf0FcEJJs4vz6ysb/ZMkGigQZseg==",
-      "dev": true,
-      "requires": {
-        "iterall": "^1.2.2"
-      }
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/graphql/-/graphql-15.0.0.tgz",
+      "integrity": "sha512-ZyVO1xIF9F+4cxfkdhOJINM+51B06Friuv4M66W7HzUOeFd+vNzUn4vtswYINPi6sysjf1M2Ri/rwZALqgwbaQ==",
+      "dev": true
     },
     "graphql-tag": {
       "version": "2.10.3",
diff --git a/package.json b/package.json
index 2e0fc00110d..d204fd8f50d 100644
--- a/package.json
+++ b/package.json
@@ -100,7 +100,7 @@
     "express": "4.17.1",
     "fastify": "2.14.1",
     "form-data": "2.5.1",
-    "graphql": "14.6.0",
+    "graphql": "15.0.0",
     "graphql-tag": "2.10.3",
     "graphql-tools": "4.0.8",
     "hapi": "17.8.5",
diff --git a/packages/apollo-gateway/src/__tests__/buildQueryPlan.test.ts b/packages/apollo-gateway/src/__tests__/buildQueryPlan.test.ts
index 52abe4def87..8b0e436d0f3 100644
--- a/packages/apollo-gateway/src/__tests__/buildQueryPlan.test.ts
+++ b/packages/apollo-gateway/src/__tests__/buildQueryPlan.test.ts
@@ -755,10 +755,10 @@ describe('buildQueryPlan', () => {
             {
               topProducts {
                 __typename
-                ... on Book {
+                ... on Furniture {
                   price
                 }
-                ... on Furniture {
+                ... on Book {
                   price
                 }
               }
@@ -793,15 +793,15 @@ describe('buildQueryPlan', () => {
             {
               topProducts {
                 __typename
-                ... on Book {
+                ... on Furniture {
                   price
                   __typename
-                  isbn
+                  upc
                 }
-                ... on Furniture {
+                ... on Book {
                   price
                   __typename
-                  upc
+                  isbn
                 }
               }
             }
@@ -809,22 +809,22 @@ describe('buildQueryPlan', () => {
           Flatten(path: "topProducts.@") {
             Fetch(service: "reviews") {
               {
-                ... on Book {
-                  __typename
-                  isbn
-                }
                 ... on Furniture {
                   __typename
                   upc
                 }
+                ... on Book {
+                  __typename
+                  isbn
+                }
               } =>
               {
-                ... on Book {
+                ... on Furniture {
                   reviews {
                     body
                   }
                 }
-                ... on Furniture {
+                ... on Book {
                   reviews {
                     body
                   }
@@ -907,12 +907,12 @@ describe('buildQueryPlan', () => {
           {
             product(upc: "") {
               __typename
-              ... on Book {
+              ... on Furniture {
                 details {
                   country
                 }
               }
-              ... on Furniture {
+              ... on Book {
                 details {
                   country
                 }
@@ -965,17 +965,46 @@ describe('buildQueryPlan', () => {
               }
               fragment __QueryPlanFragment_0__ on Product {
                 __typename
-                ... on Book {
-                  __typename
-                  isbn
-                }
                 ... on Furniture {
                   __typename
                   upc
                 }
+                ... on Book {
+                  __typename
+                  isbn
+                }
               }
             },
             Parallel {
+              Flatten(path: "topReviews.@.product") {
+                Fetch(service: "product") {
+                  {
+                    ... on Furniture {
+                      __typename
+                      upc
+                    }
+                    ... on Book {
+                      __typename
+                      isbn
+                    }
+                  } =>
+                  {
+                    ... on Furniture {
+                      name
+                      price
+                      details {
+                        country
+                      }
+                    }
+                    ... on Book {
+                      price
+                      details {
+                        country
+                      }
+                    }
+                  }
+                },
+              },
               Sequence {
                 Flatten(path: "topReviews.@.product") {
                   Fetch(service: "books") {
@@ -1013,35 +1042,6 @@ describe('buildQueryPlan', () => {
                   },
                 },
               },
-              Flatten(path: "topReviews.@.product") {
-                Fetch(service: "product") {
-                  {
-                    ... on Furniture {
-                      __typename
-                      upc
-                    }
-                    ... on Book {
-                      __typename
-                      isbn
-                    }
-                  } =>
-                  {
-                    ... on Furniture {
-                      name
-                      price
-                      details {
-                        country
-                      }
-                    }
-                    ... on Book {
-                      price
-                      details {
-                        country
-                      }
-                    }
-                  }
-                },
-              },
             },
           },
         }
@@ -1151,17 +1151,46 @@ describe('buildQueryPlan', () => {
               }
               fragment __QueryPlanFragment_0__ on Product {
                 __typename
-                ... on Book {
-                  __typename
-                  isbn
-                }
                 ... on Furniture {
                   __typename
                   upc
                 }
+                ... on Book {
+                  __typename
+                  isbn
+                }
               }
             },
             Parallel {
+              Flatten(path: "reviews.@.product") {
+                Fetch(service: "product") {
+                  {
+                    ... on Furniture {
+                      __typename
+                      upc
+                    }
+                    ... on Book {
+                      __typename
+                      isbn
+                    }
+                  } =>
+                  {
+                    ... on Furniture {
+                      name
+                      cost: price
+                      details {
+                        origin: country
+                      }
+                    }
+                    ... on Book {
+                      cost: price
+                      details {
+                        origin: country
+                      }
+                    }
+                  }
+                },
+              },
               Sequence {
                 Flatten(path: "reviews.@.product") {
                   Fetch(service: "books") {
@@ -1199,35 +1228,6 @@ describe('buildQueryPlan', () => {
                   },
                 },
               },
-              Flatten(path: "reviews.@.product") {
-                Fetch(service: "product") {
-                  {
-                    ... on Furniture {
-                      __typename
-                      upc
-                    }
-                    ... on Book {
-                      __typename
-                      isbn
-                    }
-                  } =>
-                  {
-                    ... on Furniture {
-                      name
-                      cost: price
-                      details {
-                        origin: country
-                      }
-                    }
-                    ... on Book {
-                      cost: price
-                      details {
-                        origin: country
-                      }
-                    }
-                  }
-                },
-              },
             },
           },
         }
diff --git a/packages/apollo-gateway/src/__tests__/gateway/executor.test.ts b/packages/apollo-gateway/src/__tests__/gateway/executor.test.ts
index ef63f1a7d01..4680e943b07 100644
--- a/packages/apollo-gateway/src/__tests__/gateway/executor.test.ts
+++ b/packages/apollo-gateway/src/__tests__/gateway/executor.test.ts
@@ -28,7 +28,7 @@ describe('ApolloGateway executor', () => {
     });
 
     expect(errors![0].message).toMatch(
-      'Variable "$first" got invalid value "3"; Expected type Int.',
+      'Variable "$first" got invalid value "3"; Int cannot represent non-integer value: "3"',
     );
   });
 
diff --git a/packages/apollo-server-core/src/__tests__/runQuery.test.ts b/packages/apollo-server-core/src/__tests__/runQuery.test.ts
index 87332ee4179..954b2936652 100644
--- a/packages/apollo-server-core/src/__tests__/runQuery.test.ts
+++ b/packages/apollo-server-core/src/__tests__/runQuery.test.ts
@@ -427,7 +427,7 @@ describe('runQuery', () => {
         const invocation = requestDidStart.mock.calls[0][0];
         expect(invocation).toHaveProperty('schema', schema);
         expect(invocation).toHaveProperty( /* Shorter as a RegExp */
-          'schemaHash', expect.stringMatching(/^8ff87f3e0/));
+          'schemaHash', expect.stringMatching(/^cce9f33a/));
       });
     });