diff --git a/action.yml b/action.yml
index ae74237..b7f8c8d 100644
--- a/action.yml
+++ b/action.yml
@@ -33,7 +33,7 @@ runs:
       uses: actions/cache@v4
       with:
         path: ~/ohos-sdk
-        key: ${{ runner.os }}-ohos-sdk-${{ inputs.version }}
+        key: "${{ runner.os }}-ohos-sdk-${{ inputs.version }}"
       if: ${{ inputs.cache == 'true' }}
     - name: Download and install OpenHarmony SDK
       id: install_ohos_sdk