diff --git a/ciphers/rot13.py b/ciphers/rot13.py
index 07be75356..74f52ad97 100644
--- a/ciphers/rot13.py
+++ b/ciphers/rot13.py
@@ -9,7 +9,7 @@ def dencrypt(s: str) -> str:
     >>> dencrypt(s) == msg
     True
     """
-    out:list[str] = []
+    out: list[str] = []
     n = 13
     for c in s:
         if "A" <= c <= "Z":