diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index 36ad351fc..a5ef99efd 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -141,9 +141,9 @@ deps = {
         "libs": [r"*.lib"],
     },
     "libtiff": {
-        "url": "https://download.osgeo.org/libtiff/tiff-4.2.0.tar.gz",
-        "filename": "tiff-4.2.0.tar.gz",
-        "dir": "tiff-4.2.0",
+        "url": "https://download.osgeo.org/libtiff/tiff-4.3.0.tar.gz",
+        "filename": "tiff-4.3.0.tar.gz",
+        "dir": "tiff-4.3.0",
         "build": [
             cmd_cmake("-DBUILD_SHARED_LIBS:BOOL=OFF"),
             cmd_nmake(target="clean"),