diff --git a/Demo/yarn.lock b/Demo/yarn.lock
index fd07d35..6b663e8 100644
--- a/Demo/yarn.lock
+++ b/Demo/yarn.lock
@@ -142,8 +142,8 @@ acorn-globals@^4.1.0:
     acorn "^5.0.0"
 
 acorn@^5.0.0, acorn@^5.3.0:
-  version "5.5.3"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
 
 agent-base@2, agent-base@^2.1.1:
   version "2.1.1"