diff --git a/nostr/key.py b/nostr/key.py
index d34697f..6988964 100644
--- a/nostr/key.py
+++ b/nostr/key.py
@@ -12,7 +12,7 @@ from . import bech32
 
 
 class PublicKey:
-    def __init__(self, raw_bytes: bytes) -> None:
+    def __init__(self, raw_bytes: bytes = None) -> None:
         self.raw_bytes = raw_bytes
 
     def bech32(self) -> str: