diff --git a/stubs/reportlab/METADATA.toml b/stubs/reportlab/METADATA.toml
index 331cc235f449..a01438bb6bca 100644
--- a/stubs/reportlab/METADATA.toml
+++ b/stubs/reportlab/METADATA.toml
@@ -1,4 +1,4 @@
-version = "4.5.0"
+version = "4.5.1"
 # GitHub mirror of https://hg.reportlab.com/hg-public/reportlab/file
 upstream-repository = "https://github.com/MrBitBucket/reportlab-mirror"
 
diff --git a/stubs/reportlab/reportlab/lib/utils.pyi b/stubs/reportlab/reportlab/lib/utils.pyi
index 90d166451ad3..4667000e227d 100644
--- a/stubs/reportlab/reportlab/lib/utils.pyi
+++ b/stubs/reportlab/reportlab/lib/utils.pyi
@@ -210,3 +210,12 @@ class KlassStore:
     def __contains__(self, k) -> bool: ...
     def __getitem__(self, k: str) -> type: ...
     def get(self, k, default=None): ...
+
+@type_check_only
+class _rl_warn:
+    def __init__(self) -> None: ...
+    def __call__(self, message: str) -> None: ...
+    @property
+    def warnings_seen(self) -> dict[str, set[str]]: ...
+
+rl_warn: _rl_warn
diff --git a/stubs/reportlab/reportlab/rl_config.pyi b/stubs/reportlab/reportlab/rl_config.pyi
index 7d530a71f3b2..5267a7f269a5 100644
--- a/stubs/reportlab/reportlab/rl_config.pyi
+++ b/stubs/reportlab/reportlab/rl_config.pyi
@@ -1,8 +1,13 @@
 from _typeshed import Incomplete
 from collections.abc import Callable
-from typing import Literal
+from typing import Any, Literal
+from weakref import ReferenceType
 
-def register_reset(func: Callable[[], Callable[[], object] | None]) -> None: ...
+__all__ = ("_reset", "register_reset")
+
+def register_reset(
+    func: Callable[[], Callable[[], object] | None], callback: Callable[[ReferenceType[Any]], object] | None = None
+) -> None: ...
 def _reset() -> None: ...
 
 allowTableBoundsErrors: int