diff --git a/stdlib/zlib.pyi b/stdlib/zlib.pyi
index cfd6784bb771..ea41567eefc5 100644
--- a/stdlib/zlib.pyi
+++ b/stdlib/zlib.pyi
@@ -1,6 +1,5 @@
 import sys
-from array import array
-from typing import Any
+from _typeshed import ReadableBuffer
 from typing_extensions import Literal
 
 DEFLATED: Literal[8]
@@ -29,7 +28,7 @@ Z_TREES: Literal[6]
 class error(Exception): ...
 
 class _Compress:
-    def compress(self, data: bytes) -> bytes: ...
+    def compress(self, data: ReadableBuffer) -> bytes: ...
     def flush(self, mode: int = ...) -> bytes: ...
     def copy(self) -> _Compress: ...
 
@@ -37,21 +36,26 @@ class _Decompress:
     unused_data: bytes
     unconsumed_tail: bytes
     eof: bool
-    def decompress(self, data: bytes, max_length: int = ...) -> bytes: ...
+    def decompress(self, data: ReadableBuffer, max_length: int = ...) -> bytes: ...
     def flush(self, length: int = ...) -> bytes: ...
     def copy(self) -> _Decompress: ...
 
-def adler32(__data: bytes, __value: int = ...) -> int: ...
+def adler32(__data: ReadableBuffer, __value: int = ...) -> int: ...
 
 if sys.version_info >= (3, 11):
-    def compress(__data: bytes, level: int = ..., wbits: int = ...) -> bytes: ...
+    def compress(__data: ReadableBuffer, level: int = ..., wbits: int = ...) -> bytes: ...
 
 else:
-    def compress(__data: bytes, level: int = ...) -> bytes: ...
+    def compress(__data: ReadableBuffer, level: int = ...) -> bytes: ...
 
 def compressobj(
-    level: int = ..., method: int = ..., wbits: int = ..., memLevel: int = ..., strategy: int = ..., zdict: bytes | None = ...
+    level: int = ...,
+    method: int = ...,
+    wbits: int = ...,
+    memLevel: int = ...,
+    strategy: int = ...,
+    zdict: ReadableBuffer | None = ...,
 ) -> _Compress: ...
-def crc32(__data: array[Any] | bytes, __value: int = ...) -> int: ...
-def decompress(__data: bytes, wbits: int = ..., bufsize: int = ...) -> bytes: ...
-def decompressobj(wbits: int = ..., zdict: bytes = ...) -> _Decompress: ...
+def crc32(__data: ReadableBuffer, __value: int = ...) -> int: ...
+def decompress(__data: ReadableBuffer, wbits: int = ..., bufsize: int = ...) -> bytes: ...
+def decompressobj(wbits: int = ..., zdict: ReadableBuffer = ...) -> _Decompress: ...