diff --git a/Gemfile.lock b/Gemfile.lock
index 58624cb..3c3c646 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,8 +20,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (9.0.0)
     artii (2.1.2)
     coderay (1.1.2)
@@ -55,7 +55,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.1.1)
+    public_suffix (4.0.6)
     rack (2.0.7)
     rack-protection (2.0.5)
       rack