mypy: fix hints for abstract cert error wrapper

1 files changed, 2 insertions, 2 deletions

diff --git a/qutebrowser/utils/usertypes.py b/qutebrowser/utils/usertypes.py
index b84af4524..aadda000b 100644
--- a/qutebrowser/utils/usertypes.py
+++ b/qutebrowser/utils/usertypes.py
@@ -491,7 +491,7 @@ class AbstractCertificateErrorWrapper:
     """A wrapper over an SSL/certificate error."""
 
     def __init__(self) -> None:
-        self._certificate_accepted = None
+        self._certificate_accepted: Optional[bool] = None
 
     def __str__(self) -> str:
         raise NotImplementedError
@@ -514,7 +514,7 @@ class AbstractCertificateErrorWrapper:
     def defer(self) -> None:
         raise NotImplementedError
 
-    def certificate_was_accepted(self) -> None:
+    def certificate_was_accepted(self) -> bool:
         """Check whether the certificate was accepted by the user."""
         if not self.is_overridable():
             return False