diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index a21fbef91..b400cb79b 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -120,11 +120,10 @@ V = {
     "OPENJPEG": "2.5.2",
     "TIFF": "4.6.0",
     "XZ": "5.6.3",
-    "ZLIB": "1.3.1",
+    "ZLIBNG": "2.2.2",
 }
 V["LIBPNG_DOTLESS"] = V["LIBPNG"].replace(".", "")
 V["LIBPNG_XY"] = "".join(V["LIBPNG"].split(".")[:2])
-V["ZLIB_DOTLESS"] = V["ZLIB"].replace(".", "")
 
 
 # dependencies, listed in order of compilation
@@ -161,14 +160,13 @@ DEPS: dict[str, dict[str, Any]] = {
         "bins": ["cjpeg.exe", "djpeg.exe"],
     },
     "zlib": {
-        "url": f"https://zlib.net/zlib{V['ZLIB_DOTLESS']}.zip",
-        "filename": f"zlib{V['ZLIB_DOTLESS']}.zip",
-        "dir": f"zlib-{V['ZLIB']}",
-        "license": "README",
-        "license_pattern": "Copyright notice:\n\n(.+)$",
+        "url": f"https://github.com/zlib-ng/zlib-ng/archive/refs/tags/{V['ZLIBNG']}.zip",
+        "filename": f"zlib-ng-{V['ZLIBNG']}.zip",
+        "dir": f"zlib-ng-{V['ZLIBNG']}",
+        "license": "LICENSE.md",
         "build": [
             cmd_nmake(r"win32\Makefile.msc", "clean"),
-            cmd_nmake(r"win32\Makefile.msc", "zlib.lib"),
+            cmd_nmake(r"win32\Makefile.msc", "zlib.lib", ["ZLIB_COMPAT=yes"]),
             cmd_copy("zlib.lib", "z.lib"),
         ],
         "headers": [r"z*.h"],