diff --git a/Gemfile.lock b/Gemfile.lock
index e74e337..6ec3e20 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -66,11 +66,12 @@ GEM
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     method_source (0.8.2)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.5.1)
     minitest (5.11.3)
     multi_json (1.10.1)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pry (0.10.1)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
@@ -84,6 +85,7 @@ GEM
     pry-stack_explorer (0.4.9.1)
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
+    racc (1.5.2)
     rspec (3.1.0)
       rspec-core (~> 3.1.0)
       rspec-expectations (~> 3.1.0)