diff --git a/demo_app/my_platform/Gemfile.lock b/demo_app/my_platform/Gemfile.lock
index a986b089e..8f7003097 100644
--- a/demo_app/my_platform/Gemfile.lock
+++ b/demo_app/my_platform/Gemfile.lock
@@ -428,7 +428,7 @@ GEM
     rb-inotify (0.10.0)
       ffi (~> 1.0)
     rdiscount (2.2.0.2)
-    redcarpet (3.4.0)
+    redcarpet (3.5.1)
     redis (3.3.5)
     redis-actionpack (5.2.0)
       actionpack (>= 5, < 7)