diff --git a/.github/workflows/dotnet.yml b/.github/workflows/dotnet.yml
index 71c1835..543673b 100644
--- a/.github/workflows/dotnet.yml
+++ b/.github/workflows/dotnet.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        dotnet: [ '3.1.x', '5.0.x' ]
+        dotnet: [ '5.0.x' ]
     name: .NET ${{ matrix.dotnet }}
     steps:
     - uses: actions/checkout@v2