diff --git a/Gemfile.lock b/Gemfile.lock
index b78d148..2277693 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,14 +76,14 @@ GEM
       sass (~> 3.4)
       thor (~> 0.19)
     builder (3.2.3)
-    capybara (2.14.4)
+    capybara (2.18.0)
       addressable
-      mime-types (>= 1.16)
+      mini_mime (>= 0.1.3)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
-      xpath (~> 2.0)
-    capybara-screenshot (1.0.17)
+      xpath (>= 2.0, < 4.0)
+    capybara-screenshot (1.0.18)
       capybara (>= 1.0, < 3)
       launchy
     cliver (0.3.2)
@@ -175,9 +175,6 @@ GEM
     mail (2.7.0)
       mini_mime (>= 0.1.1)
     method_source (0.8.2)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -330,8 +327,8 @@ GEM
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.3)
-    xpath (2.1.0)
-      nokogiri (~> 1.3)
+    xpath (3.0.0)
+      nokogiri (~> 1.8)
 
 PLATFORMS
   ruby