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..1c9a6eb 100644
--- a/code/14-tensorflowjs/04-rnn/es6/addition-rnn/yarn.lock
+++ b/code/14-tensorflowjs/04-rnn/es6/addition-rnn/yarn.lock
@@ -30,8 +30,8 @@ abbrev@1:
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
 
 acorn@^5.0.0:
-  version "5.5.3"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
 
 ajv@^4.9.1:
   version "4.11.8"