diff --git a/release/branch/cloudbuild.yaml b/release/branch/cloudbuild.yaml
index 540f02951d..93ba8d80ad 100644
--- a/release/branch/cloudbuild.yaml
+++ b/release/branch/cloudbuild.yaml
@@ -123,7 +123,7 @@ steps:
 
   # build docker image
   - name: 'gcr.io/cloud-builders/docker'
-    args: [ 'build', '-t', 'gcr.io/$PROJECT_ID/kpt:${BRANCH_NAME}', '.' ]
+    args: [ 'build', '-t', 'gcr.io/$PROJECT_ID/kpt:${BRANCH_NAME}', '-f', 'release/Dockerfile', '.' ]
     dir: 'kpt'
 
   # push the container image