diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3103a1f..8f53884 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -7,7 +7,7 @@ repos:
       - id: check-merge-conflict
       - id: check-case-conflict
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: v19.1.5
+    rev: v20.1.7
     hooks:
     - id: clang-format
       'types_or': [c++, c]
diff --git a/src/pybind11-utils/include/pybind11_utils/smart_variant_wrapper.h b/src/pybind11-utils/include/pybind11_utils/smart_variant_wrapper.h
index c5dd815..123d95c 100644
--- a/src/pybind11-utils/include/pybind11_utils/smart_variant_wrapper.h
+++ b/src/pybind11-utils/include/pybind11_utils/smart_variant_wrapper.h
@@ -91,7 +91,7 @@ namespace mo2::python {
         };
 
         template <class R, class C, class... Args>
-        struct function_signature<R (C::*)(Args...)&> {
+        struct function_signature<R (C::*)(Args...) &> {
             using type = R(C*, Args...);
         };