diff --git a/requirements-dev.in b/requirements-dev.in
index 9323172..686adb4 100644
--- a/requirements-dev.in
+++ b/requirements-dev.in
@@ -1,3 +1,3 @@
 pre-commit
-clang-format==18.1.8
+clang-format==21.1.8
 gcovr
diff --git a/requirements-dev.txt b/requirements-dev.txt
index a1a45ce..5de8641 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,6 @@
 cfgv==3.5.0
     # via pre-commit
-clang-format==18.1.8
+clang-format==21.1.8
     # via -r requirements-dev.in
 colorlog==6.10.1
     # via gcovr