diff --git a/Gemfile.lock b/Gemfile.lock
index bc78402..d3b9f56 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -394,7 +394,9 @@ 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_magick (4.8.0)
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
@@ -407,6 +409,7 @@ GEM
     naught (1.1.0)
     net-http-persistent (2.9.4)
     newrelic_rpm (3.14.0.305)
+    nio4r (2.5.8)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     oauth (0.4.7)
@@ -470,7 +473,8 @@ GEM
       pry (>= 0.9.10, < 0.11.0)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    puma (3.11.2)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (1.6.9)
     rack-cors (0.4.0)
     rack-test (0.6.3)
@@ -553,9 +557,9 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
+    ruby-rc4 (0.1.5)
     ruby_parser (3.14.2)
       sexp_processor (~> 4.9)
-    ruby-rc4 (0.1.5)
     sass (3.5.5)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)