diff --git a/Gemfile.lock b/Gemfile.lock
index b73ed6c..a69c0e7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,15 +91,17 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
     mini_mime (0.1.4)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.5.1)
     minitest (5.10.3)
     multi_json (1.12.2)
     nio4r (2.1.0)
-    nokogiri (1.8.1)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (0.21.0)
     public_suffix (3.0.0)
     puma (3.10.0)
+    racc (1.5.2)
     rack (2.0.3)
     rack-test (0.7.0)
       rack (>= 1.0, < 3)