diff --git a/types/aws-lambda/index.d.ts b/types/aws-lambda/index.d.ts
index d8507ef7de..4e94e5782c 100644
--- a/types/aws-lambda/index.d.ts
+++ b/types/aws-lambda/index.d.ts
@@ -221,9 +221,7 @@ interface Statement {
  * http://docs.aws.amazon.com/apigateway/latest/developerguide/use-custom-authorizer.html#api-gateway-custom-authorizer-output
  */
 interface AuthResponseContext {
-    stringKey: string;
-    numberKey: number;
-    booleanKey: boolean;
+    [name: string]: string | number | boolean;
 }
 
 /**