diff --git a/lib/libv8/version.rb b/lib/libv8/version.rb
index 54025723..62cee7b5 100644
--- a/lib/libv8/version.rb
+++ b/lib/libv8/version.rb
@@ -1,3 +1,3 @@
 module Libv8
-  VERSION = "7.3.495.0"
+  VERSION = "8.4.255.0"
 end
diff --git a/vendor/depot_tools b/vendor/depot_tools
index 9c062012..9d9199a5 160000
--- a/vendor/depot_tools
+++ b/vendor/depot_tools
@@ -1 +1 @@
-Subproject commit 9c0620120980e4c247ff8325ee8bbdcd4d9576e0
+Subproject commit 9d9199a509bf792d7d24ac91d92ed0d111f8d9fb