diff --git a/action.yml b/action.yml
index 15b169b..77e83b0 100644
--- a/action.yml
+++ b/action.yml
@@ -25,7 +25,7 @@ runs:
   - name: 安裝套件
     uses: actions/setup-dotnet@v5
     with:
-      dotnet-version: ${{ inputs.DOTNET_VERSION }}
+      dotnet-version: ${{ ASPNETCORE_ENVIRONMENT || inputs.DOTNET_VERSION }}
   - name: 資料庫移轉
     env:
       ASPNETCORE_ENVIRONMENT: ${{ inputs.DOTNET_ENVIRONMENT }}