diff --git a/Gemfile.lock b/Gemfile.lock
index 809da3e..1c557f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
     mini_mime (1.0.0)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.4.0)
     minitar (0.6.1)
     minitar-cli (0.6.1)
       minitar (~> 0.6.0)
@@ -113,8 +113,8 @@ GEM
     mustermann (1.0.2)
     netrc (0.11.0)
     nio4r (2.3.1)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
     pg (1.0.0)
     poltergeist (1.18.0)
       capybara (>= 2.1, < 4)