diff --git a/Gemfile.lock b/Gemfile.lock
index 828e808..2397a91 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,13 +111,13 @@ GEM
     mail (2.6.1)
       mime-types (>= 1.16, < 3)
     mime-types (1.25)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.4.0)
     minitest (5.10.1)
     multi_json (1.10.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
-    nokogiri (1.7.0.1)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
     oauth (0.5.1)
     oauth2 (0.7.1)
       faraday (~> 0.8)