diff --git a/Gemfile.lock b/Gemfile.lock
index c972fc7..25693a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,14 +89,18 @@ GEM
       treetop (~> 1.4.8)
     method_source (0.8.1)
     mime-types (1.19)
+    mini_portile2 (2.5.1)
     multi_json (1.3.7)
-    nokogiri (1.5.5)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (0.12.2)
     polyglot (0.3.3)
     pry (0.9.10)
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.3.1)
+    racc (1.5.2)
     rack (1.4.1)
     rack-cache (1.2)
       rack (>= 0.4)