diff --git a/python/servo/packages.py b/python/servo/packages.py
index da779051cb9..decb2695ba1 100644
--- a/python/servo/packages.py
+++ b/python/servo/packages.py
@@ -4,7 +4,7 @@
 
 WINDOWS_MSVC = {
     "cmake": "3.7.2",
-    "llvm": "4.0.0",
+    "llvm": "6.0.0",
     "moztools": "0.0.1-5",
     "ninja": "1.7.1",
     "openssl": "1.1.0e-vs2015",