diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 18bba73..825cda9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,7 +17,7 @@ jobs:
           - macos-latest
         go:
           - "stable"
-          - "1.21.0-rc.4"
+          - "1.21"
           - "1.20"
           - "1.19"
           - "1.18"
@@ -27,7 +27,7 @@ jobs:
         include:
           # test with GOEXPERIMENT=loopvar
           # https://github.com/golang/go/wiki/LoopvarExperiment
-          - go: "1.21.0-rc.4"
+          - go: "1.21"
             os: ubuntu-latest
             goexperiment: "loopvar"