diff --git a/pgpy/constants.py b/pgpy/constants.py
index a983fec6..933c100b 100644
--- a/pgpy/constants.py
+++ b/pgpy/constants.py
@@ -600,6 +600,7 @@ def _missing_(cls, val: object) -> 'String2KeyType':
             raise TypeError(f"cannot look up String2KeyType by non-int {type(val)}")
         return cls.Unknown
 
+
 class S2KGNUExtension(IntEnum):
     NoSecret = 1
     Smartcard = 2
diff --git a/pgpy/pgp.py b/pgpy/pgp.py
index 721ee1e1..30e39b0c 100644
--- a/pgpy/pgp.py
+++ b/pgpy/pgp.py
@@ -648,6 +648,7 @@ def parse(self, packet: bytes) -> None:
             else:
                 raise ValueError(f"Expected: Signature. Got: {format(pkt.__class__.__name__)}")
 
+
 class PGPUID(ParentRef):
     @property
     def __sig__(self):
diff --git a/pgpy/types.py b/pgpy/types.py
index 49c89ed6..2270f7d5 100644
--- a/pgpy/types.py
+++ b/pgpy/types.py
@@ -748,6 +748,7 @@ def __repr__(self):
 
 class SorteDeque(collections.deque):
     """A deque subclass that tries to maintain sorted ordering using bisect"""
+
     def insort(self, item):
         i = bisect.bisect_left(self, item)
         self.rotate(- i)