diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4a08a488f..7742b21f3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
         rubyopt: [""]
         include:
           - os: ubuntu
-            ruby: 3.3.0
+            ruby: 3.4.2
             rubyopt: "--enable-frozen-string-literal"
 
     runs-on: ${{ matrix.os }}-latest