diff --git a/demo_app/Gemfile.lock b/demo_app/Gemfile.lock
index 18b0362..a39a20e 100644
--- a/demo_app/Gemfile.lock
+++ b/demo_app/Gemfile.lock
@@ -87,7 +87,8 @@ GEM
     ffi (1.9.25)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
-    httparty (0.14.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     i18n (1.1.1)
       concurrent-ruby (~> 1.0)
@@ -107,7 +108,9 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.3.0)
     minitest (5.11.3)