diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 5b9ac22..27ed77d 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -37,6 +37,10 @@ jobs:
     steps:
       - name: checkout
         uses: actions/checkout@v4
+      - name: install clang-format
+        run: |
+          pipx install clang-format==23.1.0
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
       - name: run style check
         run: |
           clang-format --version
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 0c3e543..f7a8665 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,7 +1,7 @@
 repos:
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: v18.1.8  # 最新バージョンを使用
+    rev: v23.1.0  # CIのstyle-checkと同じバージョンに揃える
     hooks:
       - id: clang-format
-        files: \.(cpp|cc|h)$
+        files: ^(httplib\.h|(example|fuzzing|test)/[^/]+\.(cpp|cc|h))$
         args: [-i]  # インプレースで修正
\ No newline at end of file
diff --git a/httplib.h b/httplib.h
index 355ff41..7db99a0 100644
--- a/httplib.h
+++ b/httplib.h
@@ -6881,12 +6881,10 @@ inline int getaddrinfo_with_timeout(const char *node, const char *service,
   // actually finish before letting the stack frame go. The trade-off is that
   // a wedged DNS server can hold this thread for the system resolver timeout
   // (~30s by default) past the caller's connection timeout.
-  struct gaicb request {};
+  struct gaicb request{};
   struct gaicb *requests[1] = {&request};
-  struct sigevent sevp {};
-  struct timespec timeout {
-    timeout_sec, 0
-  };
+  struct sigevent sevp{};
+  struct timespec timeout{timeout_sec, 0};
 
   request.ar_name = node;
   request.ar_service = service;