diff --git a/yarn.lock b/yarn.lock
index 1ce6c0d..362b0a5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -54,8 +54,8 @@ acorn-jsx@^5.0.0:
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.0.0.tgz#958584ddb60990c02c97c1bd9d521fce433bb101"
 
 acorn@^6.0.7:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.1.0.tgz#b0a3be31752c97a0f7013c5f4903b71a05db6818"
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.2.tgz#35866fd710528e92de10cf06016498e47e39e1e6"
 
 ajv@^5.3.0:
   version "5.5.2"