diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ad2f216..fd5800c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,9 +24,9 @@ jobs:
             php: '8.3'
             experimental: false
             coverage: false
-          - mw: 'master'
+          - mw: 'REL1_45'
             php: '8.4'
-            experimental: true
+            experimental: false
             coverage: false
 
     runs-on: ubuntu-latest