diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index d7cf307..22bf672 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '3.3', '3.2', '3.1', '3.0', '2.7' ]
+        ruby: [ '4.0', '3.4', '3.3', '3.2', '3.1', '3.0', '2.7' ]
         postgres: [ '16', '15', '14', '13', '12' ]
         os:
           - ubuntu-latest