diff --git a/action.yaml b/action.yaml
index 6dc0ff3..93bde01 100644
--- a/action.yaml
+++ b/action.yaml
@@ -11,7 +11,8 @@ inputs:
   DOCKER_BUILD_ARGS:
     description: If you want to inject build params to docker build step.
     required: false
-    default: ""
+    default: |-
+      --build-arg sha="$GITHUB_SHA" \
   CLOUD_RUN_SERVICE_NAME:
     description: "Google Cloud Run Service name you want to deploy"
     required: true
@@ -89,8 +90,8 @@ runs:
       run: |-
         docker build \
           --tag "${{ env.ar_image_tag }}" \
-          --build-arg sha="$GITHUB_SHA" \
-          --build-arg version="${{ env.docker_tag }}" \ ${{ inputs.DOCKER_BUILD_ARGS }}
+          --build-arg version="${{ env.docker_tag }}" \ 
+          ${{ inputs.DOCKER_BUILD_ARGS }}
           .
 
     - name: Push the Image to Google Artifact Registry