diff --git a/stubs/WebOb/METADATA.toml b/stubs/WebOb/METADATA.toml
index ada90c3cf66c..eae85173da12 100644
--- a/stubs/WebOb/METADATA.toml
+++ b/stubs/WebOb/METADATA.toml
@@ -1,2 +1,2 @@
-version = "1.8.*"
+version = "~=1.8.11"
 upstream-repository = "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/Pylons/webob"
diff --git a/stubs/WebOb/webob/util.pyi b/stubs/WebOb/webob/util.pyi
index a02d71666927..0c1c015c23bc 100644
--- a/stubs/WebOb/webob/util.pyi
+++ b/stubs/WebOb/webob/util.pyi
@@ -2,6 +2,7 @@ from collections.abc import Callable
 from typing import AnyStr
 
 def html_escape(s: object) -> str: ...
+def urljoin(base: str, url: str | None) -> str: ...
 def header_docstring(header: str, rfc_section: str) -> str: ...
 def warn_deprecation(text: str, version: str, stacklevel: int) -> None: ...