diff --git a/Gemfile.lock b/Gemfile.lock
index 1751883..f312206 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,8 +8,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     capybara (3.3.1)
       addressable
       mini_mime (>= 0.1.3)
@@ -26,7 +26,7 @@ GEM
       capybara (>= 2.1, < 4)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     rack (2.0.5)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)