diff --git a/pyproject.toml b/pyproject.toml
index 66b28ec70c..0b3bd969cd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -93,7 +93,7 @@ docs = [
     "griffe>=1,<3",
     "livereload>=2.6.3,<3",
     "mike>=2.1.3,<3",
-    "pymdown-extensions>=10.20.1,<11",
+    "pymdown-extensions>=10.20.1,<12",
 ]
 
 [build-system]