diff --git a/pyzkaccess/cli.py b/pyzkaccess/cli.py
index 3e91cb3..7ed981f 100644
--- a/pyzkaccess/cli.py
+++ b/pyzkaccess/cli.py
@@ -24,7 +24,8 @@
     Tuple,
     Type,
     TypeVar,
-    Union, )
+    Union
+)
 
 import fire
 import prettytable
diff --git a/pyzkaccess/common.py b/pyzkaccess/common.py
index 8ded69c..5c7af38 100644
--- a/pyzkaccess/common.py
+++ b/pyzkaccess/common.py
@@ -176,7 +176,7 @@ def __deepcopy__(self: _DocValueT, memodict: Optional[dict] = None) -> _DocValue
         return obj
 
     def __reduce__(self: _DocValueT) -> Tuple[Type[_DocValueT], Tuple[_DocValueValueT, str]]:
-        return self.__class__, (self._self_value, self._self_doc)
+        return type(self), (self._self_value, self._self_doc)
 
     def __reduce_ex__(self: _DocValueT, _: Any) -> Tuple[Type[_DocValueT], Tuple[_DocValueValueT, str]]:
         return self.__reduce__()
diff --git a/pyzkaccess/event.py b/pyzkaccess/event.py
index c4de474..8cafdac 100644
--- a/pyzkaccess/event.py
+++ b/pyzkaccess/event.py
@@ -38,7 +38,7 @@ def __init__(self, s: str):
     def description(self) -> str:
         msg = (
             f'Event[{self.time}]: "{self.event_type.doc}" at door "{self.door}" for card "{self.card}" -- '
-            f"{self.entry_exit.name.capitalize()}"
+            f"{self.entry_exit.name.capitalize()}]"
         )
         return msg
 
@@ -70,7 +70,7 @@ def __ne__(self, other: Any) -> bool:
         return not self.__eq__(other)
 
     def __str__(self) -> str:
-        return f"Event({', '.join([f'{k}={getattr(self, k)}' for k in self.__slots__])}"
+        return f"Event({', '.join([f'{k}={getattr(self, k)}' for k in self.__slots__])})"
 
     def __repr__(self) -> str:
         return self.__str__()