diff --git a/Gemfile.lock b/Gemfile.lock
index 8430d91..7fe843d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,12 +76,13 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.2.0)
+    mini_portile2 (2.5.1)
     minitest (5.10.3)
     multi_json (1.12.2)
     nio4r (2.1.0)
-    nokogiri (1.8.0)
-      mini_portile2 (~> 2.2.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (0.21.0)
     pry (0.10.4)
       coderay (~> 1.1.0)
@@ -93,6 +94,7 @@ GEM
     pry-rails (0.3.6)
       pry (>= 0.10.4)
     puma (3.10.0)
+    racc (1.5.2)
     rack (2.0.3)
     rack-test (0.7.0)
       rack (>= 1.0, < 3)