diff --git a/.github/workflows/ci-main.yml b/.github/workflows/ci-main.yml
index dabc06aaca8f..7acef11fa21a 100644
--- a/.github/workflows/ci-main.yml
+++ b/.github/workflows/ci-main.yml
@@ -322,7 +322,9 @@ jobs:
           D:/a/wesnoth/vcpkg/bootstrap-vcpkg.bat
 
       - name: Setup cmake
-        uses: jwlawson/actions-setup-cmake@v1.8
+        uses: jwlawson/actions-setup-cmake@v1.9
+        with:
+          cmake-version: '3.20'
 
       - name: Use cmake
         run: |
@@ -374,7 +376,9 @@ jobs:
           D:/a/wesnoth/vcpkg/bootstrap-vcpkg.bat
 
       - name: Setup cmake
-        uses: jwlawson/actions-setup-cmake@v1.8
+        uses: jwlawson/actions-setup-cmake@v1.9
+        with:
+          cmake-version: '3.20'
 
       - name: Use cmake
         run: |