diff --git a/yarn.lock b/yarn.lock
index 3b74cd7..6fa28c0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -818,8 +818,9 @@ acorn-walk@^6.0.1:
   resolved "https://registry.npmjs.org/acorn-walk/-/acorn-walk-6.1.1.tgz"
 
 acorn@^5.5.3:
-  version "5.7.3"
-  resolved "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 acorn@^6.0.1, acorn@^6.0.7:
   version "6.1.1"