diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index 5bdb5fafe..a68a0b132 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -159,8 +159,8 @@ DEPS: dict[str, dict[str, Any]] = {
         "bins": ["cjpeg.exe", "djpeg.exe"],
     },
     "zlib": {
-        "url": f"https://github.com/zlib-ng/zlib-ng/archive/refs/tags/{V['ZLIBNG']}.zip",
-        "filename": f"zlib-ng-{V['ZLIBNG']}.zip",
+        "url": f"https://github.com/zlib-ng/zlib-ng/archive/refs/tags/{V['ZLIBNG']}.tar.gz",
+        "filename": f"zlib-ng-{V['ZLIBNG']}.tar.gz",
         "dir": f"zlib-ng-{V['ZLIBNG']}",
         "license": "LICENSE.md",
         "patch": {