diff --git a/yarn.lock b/yarn.lock
index e45da8e..1852374 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -191,13 +191,10 @@ acorn-jsx@^4.1.1:
   dependencies:
     acorn "^5.0.3"
 
-acorn@^5.0.0, acorn@^5.3.0:
-  version "5.6.2"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.6.2.tgz#b1da1d7be2ac1b4a327fb9eab851702c5045b4e7"
-
-acorn@^5.0.3, acorn@^5.6.0:
-  version "5.7.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.1.tgz#f095829297706a7c9776958c0afc8930a9b9d9d8"
+acorn@^5.0.0, acorn@^5.0.3, acorn@^5.3.0, acorn@^5.6.0:
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 agent-base@4, agent-base@^4.1.0:
   version "4.2.0"