diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 7b5178d..f14fc23 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -51,8 +51,10 @@ jobs:
           echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}
 
       - name: Generate tag name
+        env:
+          REF_NAME: ${{ github.ref_name }}
         run: |
-          echo "TAG_NAME=$(echo $GITHUB_REF | sed 's/main/latest/g')" >>${GITHUB_ENV}
+          echo "TAG_NAME=$(echo $REF_NAME | sed 's/main/latest/g')" >>${GITHUB_ENV}
           
       - uses: int128/docker-build-cache-config-action@v1
         id: cache