diff --git a/project/lib/zlib b/project/lib/zlib
index 508932916..21767c654 160000
--- a/project/lib/zlib
+++ b/project/lib/zlib
@@ -1 +1 @@
-Subproject commit 50893291621658f355bc5b4d450a8d06a563053d
+Subproject commit 21767c654d31d2dccdde4330529775c6c5fd5389