diff --git a/tools/ports/zlib.py b/tools/ports/zlib.py
index 727302201e3c6..46729e3de0db1 100644
--- a/tools/ports/zlib.py
+++ b/tools/ports/zlib.py
@@ -5,22 +5,20 @@
 
 import os
 
-VERSION = '1.2.12'
-HASH = 'cc2366fa45d5dfee1f983c8c51515e0cff959b61471e2e8d24350dea22d3f6fcc50723615a911b046ffc95f51ba337d39ae402131a55e6d1541d3b095d6c0a14'
-
+VERSION = '1.2.13'
+HASH = '44b834fbfb50cca229209b8dbe1f96b258f19a49f5df23b80970b716371d856a4adf525edb4c6e0e645b180ea949cb90f5365a1d896160f297f56794dd888659'
 
 def needed(settings):
   return settings.USE_ZLIB
 
-
 def get(ports, settings, shared):
-  ports.fetch_project('zlib', f'https://storage.googleapis.com/webassembly/emscripten-ports/zlib-{VERSION}.tar.gz', 'zlib-' + VERSION, sha512hash=HASH)
-
+  ports.fetch_project('zlib', 'https://github.com/madler/zlib/archive/refs/tags/v' + VERSION + '.tar.gz', 'zlib-' + VERSION, sha512hash=HASH)
   def create(final):
+    ports.clear_project_build('zlib')
     source_path = os.path.join(ports.get_dir(), 'zlib', 'zlib-' + VERSION)
     ports.write_file(os.path.join(source_path, 'zconf.h'), zconf_h)
     ports.install_headers(source_path)
-
+    
     # build
     srcs = 'adler32.c compress.c crc32.c deflate.c gzclose.c gzlib.c gzread.c gzwrite.c infback.c inffast.c inflate.c inftrees.c trees.c uncompr.c zutil.c'.split()
     flags = ['-Wno-deprecated-non-prototype']
@@ -30,7 +28,7 @@ def create(final):
 
 
 def clear(ports, settings, shared):
-  shared.Cache.erase_lib('libz.a')
+  shared.Cache.erase_file('libz.a')
 
 
 def process_args(ports):