diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4353251..87073b9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,6 +35,7 @@ jobs:
             6.0.x
             7.0.x
             8.0.x
+            9.0.x
       - name: Build
         run: dotnet build src --configuration Release
       - name: Tests