diff --git a/yarn.lock b/yarn.lock
index 3b50cdf2c..509ab45e8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -908,8 +908,9 @@ acorn-dynamic-import@^4.0.0:
   resolved "https://registry.yarnpkg.com/acorn-dynamic-import/-/acorn-dynamic-import-4.0.0.tgz#482210140582a36b83c3e342e1cfebcaa9240948"
 
 acorn@^6.0.5:
-  version "6.0.6"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.0.6.tgz#cd75181670d5b99bdb1b1c993941d3a239ab1f56"
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.2.tgz#35866fd710528e92de10cf06016498e47e39e1e6"
+  integrity sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==
 
 agentkeepalive@^2.2.0:
   version "2.2.0"