diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index f605ab59..0ad3d0c4 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -12,7 +12,6 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - head
           - '3.1'
           - '3.0'
           - '2.7'