diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 53ec80290b..3ff4f54c30 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -32,7 +32,7 @@ jobs:
     - name: Build fsharp master (turn of CI build status)
       run: cd fsharp && eng\CIBuild.cmd -noVisualStudio
     - name: Run fsdocs
-      run: dotnet fsdocs build --sourcefolder fsharp --input fsharp/docs
+      run: dotnet fsdocs build --sourcefolder fsharp --input fsharp/docs --strict
     - name: Deploy
       uses: peaceiris/actions-gh-pages@v3
       with:
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 68426085a4..486069a81f 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -33,4 +33,4 @@ jobs:
     - name: Build fsharp master (turn of CI build status)
       run: cd fsharp && eng\CIBuild.cmd  -noVisualStudio
     - name: Run fsdocs
-      run: dotnet fsdocs build --sourcefolder fsharp --input fsharp/docs
+      run: dotnet fsdocs build --sourcefolder fsharp --input fsharp/docs --strict