diff --git a/pyproject.toml b/pyproject.toml
index 66946a85..fa5d4913 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ requires-python = ">=3.5"
 [project.optional-dependencies]
 dev = [
   # Setup.
-  "pre-commit==4.3.0 ; python_version>='3.9'",
+  "pre-commit==4.6.0 ; python_version>='3.9'",
   "tox==3.27.1 ; python_version<'3.8'",
   "tox==4.24.1 ; python_version>='3.8' and python_version<'3.9'",
   "tox==4.30.2 ; python_version>='3.9'",