diff --git a/Gemfile.lock b/Gemfile.lock
index 6a030be..f2ebf3a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,8 +2,8 @@ GEM
   remote: http://rubygems.org/
   specs:
     RedCloth (4.3.2)
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     builder (3.2.2)
     capybara (2.11.0)
       addressable
@@ -38,7 +38,7 @@ GEM
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
-    public_suffix (2.0.5)
+    public_suffix (4.0.6)
     rack (1.6.5)
     rack-protection (1.5.3)
       rack