diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fbe9a5b..c56a07d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [ "3.1", "3.2", "3.3" ]
+        ruby-version: [ "3.3" ]
     steps:
     - uses: actions/checkout@v2