diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 11b5bc95283..15d817f3096 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,6 +57,11 @@ jobs:
           python -m tools.ci.check_legacy_attack_chain
           python -m tools.maplint.source --github
 
+      - name: Setup .NET SDK
+        uses: actions/setup-dotnet@v4.2.0
+        with:
+          dotnet-version: 9.x
+
       - name: Run DreamChecker
         shell: bash
         run: ~/dreamchecker 2>&1 | bash tools/ci/annotate_dm.sh