diff --git a/README.md b/README.md
index 466c0579..74bf8cbb 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Rusty V8 Binding
 
-V8 Version: 9.5.172.19
+V8 Version: 9.5.172.21
 
 [![ci](https://github.com/denoland/rusty_v8/workflows/ci/badge.svg?branch=main)](https://github.com/denoland/rusty_v8/actions)
 [![crates](https://img.shields.io/crates/v/rusty_v8.svg)](https://crates.io/crates/rusty_v8)
diff --git a/v8 b/v8
index 4964da2c..de23b2cb 160000
--- a/v8
+++ b/v8
@@ -1 +1 @@
-Subproject commit 4964da2c01888f579983b167b4952bc9c1fd3671
+Subproject commit de23b2cb7341cbe97e3329fa58a789967afa1803