diff --git a/lib/zlib/zlib b/lib/zlib/zlib
index cacf7f1d4..51b7f2abd 160000
--- a/lib/zlib/zlib
+++ b/lib/zlib/zlib
@@ -1 +1 @@
-Subproject commit cacf7f1d4e3d44d871b605da3b647f07d718623f
+Subproject commit 51b7f2abdade71cd9bb0e7a373ef2610ec6f9daf