diff --git a/yarn.lock b/yarn.lock
index 52a7af9..f07b8a2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1011,8 +1011,8 @@ acorn-jsx@^5.1.0:
   resolved "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.1.0.tgz#294adb71b57398b0680015f0a38c563ee1db5384"
 
 acorn@^5.0.0, acorn@^5.2.1:
-  version "5.5.3"
-  resolved "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
 
 acorn@^6.2.1:
   version "6.4.0"