diff --git a/code/14-tensorflowjs/04-rnn/es6/addition-rnn/yarn.lock b/code/14-tensorflowjs/04-rnn/es6/addition-rnn/yarn.lock
index 0ff9fc7..26a3092 100644
--- a/code/14-tensorflowjs/04-rnn/es6/addition-rnn/yarn.lock
+++ b/code/14-tensorflowjs/04-rnn/es6/addition-rnn/yarn.lock
@@ -4328,8 +4328,8 @@ vega-typings@*, vega-typings@^0.2.11:
     prettier "^1.10.2"
 
 vega-util@1, vega-util@^1.7, vega-util@^1.7.0:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/vega-util/-/vega-util-1.7.0.tgz#0ca0512bb8dcc6541165c34663d115d0712e0cf1"
+  version "1.16.1"
+  resolved "https://registry.yarnpkg.com/vega-util/-/vega-util-1.16.1.tgz#992bf3c3b6e145797214d99862841baea417ba39"
 
 vega-view-transforms@^1.2:
   version "1.2.0"