diff --git a/Gemfile.lock b/Gemfile.lock
index 1601888..98c9bb3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,14 +55,16 @@ GEM
       rake (>= 0.9.2.2)
     method_source (0.8.2)
     mime-types (2.99.1)
-    mini_portile2 (2.0.0)
+    mini_portile2 (2.1.0)
     minitest (5.8.4)
     minitest-stub_any_instance (1.0.1)
     multi_json (1.11.2)
     multipart-post (2.0.0)
     netrc (0.11.0)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
+    nokogiri (1.6.8)
+      mini_portile2 (~> 2.1.0)
+      pkg-config (~> 1.1.7)
+    pkg-config (1.1.7)
     purdytest (2.0.0)
       minitest (~> 5.5)
     rack (1.6.4)