diff --git a/Gemfile.lock b/Gemfile.lock
index e0a1ef3..5037524 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -128,7 +128,9 @@ 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_portile2 (2.2.0)
     minitest (5.10.3)
     mize (0.3.2)
@@ -175,7 +177,7 @@ GEM
       pry (~> 0.10)
     public_suffix (2.0.5)
     puma (3.9.1)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.2)