diff --git a/yarn.lock b/yarn.lock
index 9d086bf..5b748da 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -40,8 +40,8 @@ acorn-globals@^4.0.0:
     acorn "^5.0.0"
 
 acorn@^5.0.0, acorn@^5.1.2:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.3.0.tgz#7446d39459c54fb49a80e6ee6478149b940ec822"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
 
 add-stream@^1.0.0:
   version "1.0.0"