diff --git a/Gemfile.lock b/Gemfile.lock
index 02e4451..0f45651 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,18 +118,22 @@ 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 (1.0.0)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.6.1)
     minitest (5.11.3)
     msgpack (1.2.4)
     multi_json (1.13.1)
     netrc (0.11.0)
     nio4r (2.3.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     public_suffix (3.0.2)
     puma (3.11.3)
+    racc (1.5.2)
     rack (2.0.4)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)