diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c45794b16..e7d6c762b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,7 @@ jobs:
         uses: crazy-max/ghaction-docker-meta@v2
         with:
           images: |
-            gcr.io/up9-docker-hub/mizu/${{GITHUB_REF##*/}}
+            'gcr.io/up9-docker-hub/mizu/${GITHUB_REF##*/}'
           tags: |
             type=sha
             type=raw,${{GITHUB_SHA}}