diff --git a/python/build/libs.py b/python/build/libs.py
index 17edfa5f1..37900f379 100644
--- a/python/build/libs.py
+++ b/python/build/libs.py
@@ -66,8 +66,8 @@ flac = AutotoolsProject(
 )
 
 zlib = ZlibProject(
-    'http://zlib.net/zlib-1.2.13.tar.xz',
-    'd14c38e313afc35a9a8760dadf26042f51ea0f5d154b0630a31da0540107fb98',
+    'http://zlib.net/zlib-1.3.tar.xz',
+    '8a9ba2898e1d0d774eca6ba5b4627a11e5588ba85c8851336eb38de4683050a7',
     'lib/libz.a',
 )