diff --git a/Gemfile.lock b/Gemfile.lock
index 25c1bac..965d874 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,8 +16,8 @@ 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)
     bourbon (6.0.0)
       thor (~> 0.19)
     coderay (1.1.2)
@@ -111,7 +111,7 @@ 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 (2.0.6)
     rake (12.3.2)
     rb-fsevent (0.10.3)