diff --git a/tools/clang/scripts/update.py b/tools/clang/scripts/update.py
index f612e6cbc42507..8b762dc72a6c60 100755
--- a/tools/clang/scripts/update.py
+++ b/tools/clang/scripts/update.py
@@ -347,7 +347,7 @@ def AddGnuWinToPath():
     return
 
   gnuwin_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, 'gnuwin')
-  GNUWIN_VERSION = '8'
+  GNUWIN_VERSION = '9'
   GNUWIN_STAMP = os.path.join(gnuwin_dir, 'stamp')
   if ReadStampFile(GNUWIN_STAMP) == GNUWIN_VERSION:
     print 'GNU Win tools already up to date.'