diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 139af8f..7482dbc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,7 +44,7 @@ jobs:
           dotnet-version: ${{ matrix.dotnet-version }}
 
       - name: Setup Stryker 🔧
-        run: dotnet tool install -g dotnet-stryker
+        run: dotnet tool install -g dotnet-stryker --version 4.0.0
 
       - name: Install dotnet-format tool 🔧
         run: dotnet tool install -g dotnet-format