diff --git a/Gemfile.lock b/Gemfile.lock
index 4318fd7..45ae377 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,18 +85,20 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.5.1)
     minitest (5.10.1)
     multi_json (1.12.1)
     nio4r (2.0.0)
-    nokogiri (1.7.1)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (0.19.0)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
     puma (3.8.2)
+    racc (1.5.2)
     rack (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)