diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7972dcf6..4808e65c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -13,7 +13,7 @@ parameters:
 jobs:
   build:
     docker:
-    - image: cimg/go:1.21.3
+    - image: cimg/go:1.23.4
     resource_class: large
     environment:
       TZ: /usr/share/zoneinfo/Asia/Tokyo
diff --git a/.github/workflows/build_pr.yml b/.github/workflows/build_pr.yml
index 162c66be..6047472b 100644
--- a/.github/workflows/build_pr.yml
+++ b/.github/workflows/build_pr.yml
@@ -1,7 +1,7 @@
 name: CI-pr
 
 env:
-  GO_VERSION: 1.21.3
+  GO_VERSION: 1.23.4
   TZ: Asia/Tokyo
   DOCS_TARXZ: docs.tar.xz
 on: