diff --git a/noise/noise_protocol.py b/noise/noise_protocol.py
index cc18a3f..34cb4d4 100644
--- a/noise/noise_protocol.py
+++ b/noise/noise_protocol.py
@@ -31,15 +31,15 @@ class NoiseProtocol(object):
         if self.pattern_modifiers:
             self.pattern.apply_pattern_modifiers(pattern_modifiers)
 
-        self.dh_fn: 'DH' = mappings['dh']
-        self.cipher_fn: 'Cipher' = mappings['cipher']
-        self.hash_fn: 'Hash' = mappings['hash']
+        self.dh_fn = mappings['dh']
+        self.cipher_fn = mappings['cipher']
+        self.hash_fn = mappings['hash']
 
-        self.psks: list = None  # Placeholder for PSKs
+        self.psks = None  # Placeholder for PSKs
 
-        self.handshake_state: 'HandshakeState' = Empty()
-        self.symmetric_state: 'SymmetricState' = Empty()
-        self.cipher_state: 'CipherState' = Empty()
+        self.handshake_state = Empty()
+        self.symmetric_state = Empty()
+        self.cipher_state = Empty()
 
     def _parse_protocol_name(self) -> Tuple[dict, list]:
         unpacked = self.name.decode().split('_')
diff --git a/noise/patterns.py b/noise/patterns.py
index 4c6de8e..c2f3f25 100644
--- a/noise/patterns.py
+++ b/noise/patterns.py
@@ -10,13 +10,13 @@ class Pattern(object):
     # As per specification, if both parties have pre-messages, the initiator is listed first. To reduce complexity,
     # pre_messages shall be a list of two lists:
     # the first for the initiator's pre-messages, the second for the responder
-    pre_messages: List[list] = [
+    pre_messages = [
         [],
         []
     ]
 
     # List of lists of valid tokens, alternating between tokens for initiator and responder
-    tokens: List[list] = []
+    tokens = []
 
     def __init__(self):
         self.has_pre_messages = any(map(lambda x: len(x) > 0, self.pre_messages))