diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0f41f34..a0aff27 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
         with:
           repository: rubygems/rubygems
           path: rubygems
-          ref: 3.5
+          ref: 3.6
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@a2bbe5b1b236842c1cb7dd11e8e3b51e0a616acc #v1.202.0