diff --git a/Gemfile.lock b/Gemfile.lock
index b3c696d..efa448b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,8 +31,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     bitstamp (0.3.0)
       activemodel (>= 3.1)
       activesupport (>= 3.1)
@@ -121,7 +121,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.2.2)