diff --git a/tools/zlib/Makefile b/tools/zlib/Makefile
index e802a0272e..6786e14be4 100644
--- a/tools/zlib/Makefile
+++ b/tools/zlib/Makefile
@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=zlib
-PKG_VERSION:=1.3
+PKG_VERSION:=1.3.1
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://github.com/madler/zlib/releases/download/v$(PKG_VERSION)
-PKG_HASH:=8a9ba2898e1d0d774eca6ba5b4627a11e5588ba85c8851336eb38de4683050a7
+PKG_HASH:=38ef96b8dfe510d42707d9c781877914792541133e1870841463bfa73f883e32
 
 PKG_LICENSE:=Zlib
 PKG_LICENSE_FILES:=README