diff --git a/lib/chimp-datasources-generator.js b/lib/chimp-datasources-generator.js
index 1985357..0fa8095 100755
--- a/lib/chimp-datasources-generator.js
+++ b/lib/chimp-datasources-generator.js
@@ -45,6 +45,13 @@ program
     shelljs.sed("-i", /this.UPDATE/, "this.update", `${resolvedPath}/api.ts`);
     shelljs.sed("-i", /this.PUT/, "this.put", `${resolvedPath}/api.ts`);
 
+    shelljs.sed(
+      "-i",
+      /extends null/,
+      "extends GenericObject",
+      `${resolvedPath}/api.ts`
+    );
+
     if (dataSourceImport) {
       const { dataSourceName, importString } = extractor(dataSourceImport);
 
diff --git a/lib/typescript-fetch/api.mustache b/lib/typescript-fetch/api.mustache
index 044b90a..14758af 100644
--- a/lib/typescript-fetch/api.mustache
+++ b/lib/typescript-fetch/api.mustache
@@ -8,6 +8,7 @@ import { Configuration } from "./configuration";
 import { RESTDataSource } from "apollo-datasource-rest";
 // {$CustomDataSourcePlaceholder}
 
+type GenericObject<key, type> = {}
 
 const BASE_PATH = "{{{basePath}}}".replace(/\/+$/, "");