diff --git a/Gemfile.lock b/Gemfile.lock
index 4f45ae8..365ea15 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,10 +190,12 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.7.0)
     mini_mime (1.0.1)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.6.1)
     minitest (5.11.3)
     msgpack (1.2.4)
     msgpack (1.2.4-x64-mingw32)
@@ -203,10 +205,11 @@ GEM
     multipart-post (2.0.0)
     mustermann (1.0.3)
     nio4r (2.3.1)
-    nokogiri (1.8.5)
-      mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.5-x64-mingw32)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
+    nokogiri (1.12.5-x64-mingw32)
+      racc (~> 1.4)
     notifications (0.6.0)
       kaminari (>= 0.15)
       rails (~> 5)
@@ -229,6 +232,7 @@ GEM
     pg (1.1.3-x64-mingw32)
     public_suffix (3.0.3)
     puma (3.12.0)
+    racc (1.5.2)
     rack (2.0.6)
     rack-protection (2.0.4)
       rack