diff --git a/Gemfile.lock b/Gemfile.lock
index 57d4c2c..d13f45e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     backports (3.15.0)
     bcp47 (0.3.3)
       i18n
@@ -97,7 +97,7 @@ GEM
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
-    public_suffix (3.0.0)
+    public_suffix (5.0.0)
     puma (3.10.0)
     rack (2.0.7)
     rack-cache (1.7.1)