diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8b8d510..e2fef62 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,11 +1,11 @@
 repos:
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: b111689e7b5cba60be3c62d5db2bd1357f4d36ca
+    rev: 6d365699efc33b1b432eab5b4ae331a19e1857de  # frozen: v18.1.2
     hooks:
       - id: clang-format
         exclude: ".*third_party/.*"
   - repo: https://github.com/cheshirekow/cmake-format-precommit
-    rev: e2c2116d86a80e72e7146a06e68b7c228afc6319
+    rev: e2c2116d86a80e72e7146a06e68b7c228afc6319  # frozen: v0.6.13
     hooks:
       - id: cmake-format
   - repo: local
diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index cae6fa1..fd43fdf 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -2614,7 +2614,7 @@ int64_t ConflictSet::getBytes() const { return impl->totalBytes; }
 
 ConflictSet::ConflictSet(int64_t oldestVersion)
     : impl((mallocBytesDelta = 0,
-            new (safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
+            new(safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
   impl->totalBytes += mallocBytesDelta;
 }
 
diff --git a/HashTable.cpp b/HashTable.cpp
index 8f44f3e..fc6f434 100644
--- a/HashTable.cpp
+++ b/HashTable.cpp
@@ -99,7 +99,7 @@ void ConflictSet::setOldestVersion(int64_t oldestVersion) {
 int64_t ConflictSet::getBytes() const { return -1; }
 
 ConflictSet::ConflictSet(int64_t oldestVersion)
-    : impl(new (safe_malloc(sizeof(Impl))) Impl{oldestVersion}) {}
+    : impl(new(safe_malloc(sizeof(Impl))) Impl{oldestVersion}) {}
 
 ConflictSet::~ConflictSet() {
   if (impl) {
diff --git a/SkipList.cpp b/SkipList.cpp
index 9ea5792..6b47a44 100644
--- a/SkipList.cpp
+++ b/SkipList.cpp
@@ -669,7 +669,7 @@ int64_t ConflictSet::getBytes() const { return impl->totalBytes; }
 
 ConflictSet::ConflictSet(int64_t oldestVersion)
     : impl((mallocBytesDelta = 0,
-            new (safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
+            new(safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
   impl->totalBytes += mallocBytesDelta;
 }