diff --git a/.github/workflows/pull_request.yaml b/.github/workflows/pull_request.yaml
index 9570f72..86b8aa1 100644
--- a/.github/workflows/pull_request.yaml
+++ b/.github/workflows/pull_request.yaml
@@ -7,7 +7,7 @@ jobs:
   ci:
     strategy:
       matrix:
-        go-version: [ 1.21.3 ]
+        go-version: [ 1.23.3 ]
         os: [ ubuntu-latest ]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/go.mod b/go.mod
index 47ee94a..4b6e43a 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/syumai/workers
 
-go 1.21.3
+go 1.23.3