diff --git a/archive/p/python/base64_encode_decode.py b/archive/p/python/base64_encode_decode.py
index cb67cf4ec..a9cde8c90 100644
--- a/archive/p/python/base64_encode_decode.py
+++ b/archive/p/python/base64_encode_decode.py
@@ -14,7 +14,7 @@ def base64_encode(s: str) -> str:
 
 
 def base64_decode(s: str) -> str:
-    return base64.b64decode(s.encode("ascii")).decode("ascii")
+    return base64.b64decode(s.encode("ascii"), validate=True).decode("ascii")
 
 
 def main() -> None | NoReturn: