diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7588b4b..5a025f0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,9 +19,8 @@ jobs:
         uses: actions/setup-dotnet@v3
         with:
           dotnet-version: | 
-           3.1.x
-           5.0.x
            6.0.x
+           7.0.x
 
       - name: dotnet build
         run: dotnet build