diff --git a/stubs/chardet/chardet/universaldetector.pyi b/stubs/chardet/chardet/universaldetector.pyi
index e1c748dab0cc..79dc7130d052 100644
--- a/stubs/chardet/chardet/universaldetector.pyi
+++ b/stubs/chardet/chardet/universaldetector.pyi
@@ -25,5 +25,5 @@ class UniversalDetector:
     logger: Logger
     def __init__(self, lang_filter: int = 31) -> None: ...
     def reset(self) -> None: ...
-    def feed(self, byte_str: bytes) -> None: ...
+    def feed(self, byte_str: bytes | bytearray) -> None: ...
     def close(self) -> _FinalResultType: ...