diff --git a/action.yml b/action.yml
index 0cf9d0b..580c3d9 100644
--- a/action.yml
+++ b/action.yml
@@ -13,15 +13,21 @@ runs:
     uses: https://gitea.jsc.idv.tw/docker-actions/calculate-version@${{ vars.ACTION_CALCULATE_VERSION }}
   - name: 組合釋出參數
     id: release-params
-    shell: bash
     run: |
       repository="${{ gitea.repository }}"
-      version="v${{ steps.version-calculate.outputs.version }}"
+      version_value="${{ steps.version-calculate.outputs.version }}"
+      if [ -z "$version_value" ]; then
+        echo "version-calculate output version is empty" >&2
+        exit 1
+      fi
+
+      version="v${version_value}"
       repository_name="${repository##*/}"
       {
         echo "name=${repository_name} ${version}"
         echo "tag_name=${version}"
       } >> "$GITHUB_OUTPUT"
+    shell: bash
   - name: 釋出並標註成品版本
     uses: akkuman/gitea-release-action@${{ vars.ACTION_GITEA_RELEASE_VERSION }}
     with: