diff --git a/Gemfile.lock b/Gemfile.lock
index 3822f12..d4456cb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,8 +30,7 @@ GEM
       multi_json (~> 1.0)
     arel (3.0.2)
     builder (3.0.0)
-    childprocess (0.3.1)
-      ffi (~> 1.0.6)
+    childprocess (4.1.0)
     coderay (1.0.6)
     coffee-rails (3.2.2)
       coffee-script (>= 2.2.0)
@@ -44,7 +43,7 @@ GEM
     erubis (2.7.0)
     execjs (1.3.0)
       multi_json (~> 1.0)
-    ffi (1.0.11)
+    ffi (1.15.5)
     guard (1.0.1)
       ffi (>= 0.5.0)
       thor (~> 0.14.6)
@@ -75,7 +74,7 @@ GEM
       treetop (~> 1.4.8)
     method_source (0.7.1)
     mime-types (1.18)
-    multi_json (1.2.0)
+    multi_json (1.15.0)
     polyglot (0.3.3)
     pry (0.9.8.4)
       coderay (~> 1.0.5)
@@ -106,6 +105,7 @@ GEM
     rake (0.9.2.2)
     rdoc (3.12)
       json (~> 1.4)
+    rexml (3.2.5)
     rspec (2.9.0)
       rspec-core (~> 2.9.0)
       rspec-expectations (~> 2.9.0)
@@ -119,17 +119,16 @@ GEM
       activesupport (>= 3.0)
       railties (>= 3.0)
       rspec (~> 2.9.0)
-    rubyzip (0.9.7)
+    rubyzip (2.3.2)
     sass (3.1.15)
     sass-rails (3.2.5)
       railties (~> 3.2.0)
       sass (>= 3.1.10)
       tilt (~> 1.3)
-    selenium-webdriver (2.20.0)
-      childprocess (>= 0.2.5)
-      ffi (~> 1.0)
-      multi_json (~> 1.0)
-      rubyzip
+    selenium-webdriver (4.8.6)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
     slop (2.4.4)
     sprockets (2.1.2)
       hike (~> 1.2)
@@ -144,6 +143,7 @@ GEM
     uglifier (1.2.4)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)
+    websocket (1.2.9)
 
 PLATFORMS
   ruby