diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 2137b83..7196aaa 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -12,7 +12,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go: ["1.21.0"]
+        go: ["1.18.0"]
     name: build & test
     runs-on: ubuntu-latest
     steps: