diff --git a/Gemfile.lock b/Gemfile.lock
index 4ed71fc..4471663 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -34,8 +34,10 @@ GEM
       rb-fchange (~> 0.0.5)
       rb-fsevent (~> 0.9.1)
       rb-inotify (~> 0.8.8)
+    mini_portile2 (2.4.0)
     multi_json (1.3.6)
-    nokogiri (1.5.5)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
     polyglot (0.3.3)
     predicated (0.2.6)
     puma (2.11.3)