diff --git a/Gemfile.lock b/Gemfile.lock
index 7865267..b4f2dbc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,8 +16,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       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)
     codecov (0.2.5)
       colorize
       json
@@ -69,7 +69,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.1.1)
+    public_suffix (4.0.6)
     rake (13.0.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)