diff --git a/packages/graphql-language-service-server/src/parseDocument.ts b/packages/graphql-language-service-server/src/parseDocument.ts
index 7190119c354..3eb12d9a3f9 100644
--- a/packages/graphql-language-service-server/src/parseDocument.ts
+++ b/packages/graphql-language-service-server/src/parseDocument.ts
@@ -6,7 +6,11 @@ import { findGraphQLTags, DEFAULT_TAGS } from './findGraphQLTags';
 
 export const DEFAULT_SUPPORTED_EXTENSIONS = ['.js', '.ts', '.jsx', '.tsx'];
 
-export const DEFAULT_SUPPORTED_GRAPHQL_EXTENSIONS = ['.graphql'];
+export const DEFAULT_SUPPORTED_GRAPHQL_EXTENSIONS = [
+  '.graphql',
+  '.graphqls',
+  '.gql',
+];
 
 /**
  * Helper functions to perform requested services from client/server.