diff --git a/package/libzlib/libzlib.mk b/package/libzlib/libzlib.mk
index e344cc7ad9..b6193a6767 100644
--- a/package/libzlib/libzlib.mk
+++ b/package/libzlib/libzlib.mk
@@ -6,7 +6,7 @@
 
 LIBZLIB_VERSION = 1.2.13
 LIBZLIB_SOURCE = zlib-$(LIBZLIB_VERSION).tar.xz
-LIBZLIB_SITE = http://www.zlib.net
+LIBZLIB_SITE = https://www.zlib.net
 LIBZLIB_LICENSE = Zlib
 LIBZLIB_LICENSE_FILES = LICENSE
 LIBZLIB_INSTALL_STAGING = YES