diff --git a/.github/workflows/actions.yml b/.github/workflows/actions.yml
index 9e4cd2c..028a11c 100644
--- a/.github/workflows/actions.yml
+++ b/.github/workflows/actions.yml
@@ -16,7 +16,10 @@ jobs:
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: ${{ env.DOTNET_VERSION }}
+          dotnet-version: |
+            ${{ env.DOTNET_VERSION }}
+            3.1.x
+            6.0.x
 
       - name: Install dependencies
         run: dotnet restore ./GroBuf.sln --verbosity minimal && dotnet tool restore