diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 34e1b77..4a4b965 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: [2.6, 2.7, '3.0', 3.1, 3.2]
+        ruby-version: [3.2]
 
     steps:
     - uses: actions/checkout@v3