diff --git a/tools/gulp/util/firebase.ts b/tools/gulp/util/firebase.ts
index 586e1d5ba8f8..3675aee4ad1a 100644
--- a/tools/gulp/util/firebase.ts
+++ b/tools/gulp/util/firebase.ts
@@ -38,7 +38,7 @@ export function openScreenshotsBucket() {
     projectId: 'material2-screenshots',
     credentials: {
       client_email: 'firebase-adminsdk-t4209@material2-screenshots.iam.gserviceaccount.com',
-      private_key: decode(process.env['MATERIAL2_SCREENSHOT_FIREBASE_SERVICE_KEY'])
+      private_key: decode(process.env['MATERIAL2_SCREENSHOT_FIREBASE_KEY'])
     },
   });