diff --git a/gclient_config.py b/gclient_config.py
index c3bfd32edb..ab8253771b 100644
--- a/gclient_config.py
+++ b/gclient_config.py
@@ -1,7 +1,7 @@
 # Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 solutions = [
     {
-        'url': 'https://chromium.googlesource.com/v8/v8.git@7.9.304',
+        'url': 'https://chromium.googlesource.com/v8/v8.git@7.9.317.12',
         'name': 'v8',
         'deps_file': 'DEPS',
         'custom_deps': {
diff --git a/third_party b/third_party
index fabd588f10..cab4821cd9 160000
--- a/third_party
+++ b/third_party
@@ -1 +1 @@
-Subproject commit fabd588f101cdb0817e2a41b6969613b910347e6
+Subproject commit cab4821cd937dd3c927430f0f0e05a38af1b84a0