diff --git a/Gemfile.lock b/Gemfile.lock
index bd101aa..3efa57a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -66,16 +66,18 @@ GEM
       rb-inotify (>= 0.9)
     mercenary (0.3.5)
     mini_magick (4.0.2)
-    mini_portile (0.6.2)
+    mini_portile2 (2.8.0)
     multi_json (1.10.1)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     parslet (1.5.0)
       blankslate (~> 2.0)
     posix-spawn (0.3.9)
     pygments.rb (0.6.0)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
+    racc (1.6.0)
     rack (1.6.0)
     rb-fsevent (0.9.4)
     rb-inotify (0.9.5)