diff --git a/src/browser/browser.py b/src/browser/browser.py
index 7e34d0b..4263687 100755
--- a/src/browser/browser.py
+++ b/src/browser/browser.py
@@ -64,7 +64,7 @@ def minimumSizeHint(self):
         """
         return QSize(800, 400)
 
-    def mouseReleaseEvent(self, event: QMouseEvent | None) -> None:
+    def mouseReleaseEvent(self, event) -> None:
         """
         Handle a click somewhere in the renderer area. See if it
         matches any known link.