diff --git a/py/selenium/webdriver/common/options.py b/py/selenium/webdriver/common/options.py
index af0dd55e285ac..d0381256af6c4 100644
--- a/py/selenium/webdriver/common/options.py
+++ b/py/selenium/webdriver/common/options.py
@@ -344,7 +344,7 @@ def __init__(self) -> None:
     def capabilities(self):
         return self._caps
 
-    def set_capability(self, name, value) -> None:
+    def set_capability(self, name: str, value: object) -> None:
         """Sets a capability."""
         self._caps[name] = value