diff --git a/demo-5.2.1/Gemfile.lock b/demo-5.2.1/Gemfile.lock
index f377b32..4cb3f21 100644
--- a/demo-5.2.1/Gemfile.lock
+++ b/demo-5.2.1/Gemfile.lock
@@ -97,7 +97,7 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.7)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)