diff --git a/Gemfile.lock b/Gemfile.lock
index ca48e5a..6337f3a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ 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)
     ast (2.4.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -30,7 +30,7 @@ GEM
       ast (~> 2.4.0)
     powerpack (0.1.2)
     psych (3.1.0)
-    public_suffix (3.0.0)
+    public_suffix (4.0.7)
     rainbow (3.0.0)
     rake (12.3.3)
     rspec (3.8.0)