diff --git a/.github/workflows/spec_guards.yml b/.github/workflows/spec_guards.yml
index 3f829650d5..06987a6cff 100644
--- a/.github/workflows/spec_guards.yml
+++ b/.github/workflows/spec_guards.yml
@@ -27,7 +27,7 @@ jobs:
         # This also ensures the needed ruby_version_is guards are there, see spec/README.md.
         ruby:
           - ruby-2.7
-          - ruby-3.0
+          - ruby-3.1
 
     steps:
       - uses: actions/checkout@v2