diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 6110f4b..db611b8 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '3.2', '3.1', '3.0', '2.7' ]
+        ruby: [ '3.4', '3.3', '3.2', '3.1', '3.0', '2.7' ]
         os:
           - ubuntu-latest
     name: Ruby ${{ matrix.ruby }} unit testing on ${{ matrix.os }}