diff --git a/.github/workflows/continuous_integration.yml b/.github/workflows/continuous_integration.yml
index ad2ea03a..3acf4743 100644
--- a/.github/workflows/continuous_integration.yml
+++ b/.github/workflows/continuous_integration.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.3, 2.7]
+        ruby: [2.3, 2.7, 3.0]
         operating-system: [ubuntu-latest]
         include:
           - ruby: head