diff --git a/README.md b/README.md
index e9d247d..bf7065a 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: [1.20.x]
+        go-version: [1.21]
     steps:
       - name: checkout source code
         uses: actions/checkout@v3