diff --git a/Gemfile.lock b/Gemfile.lock
index 80ef7fe..0e3d7bd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ 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)
     colorator (1.1.0)
     concurrent-ruby (1.0.5)
     cssminify2 (2.0.1)
@@ -84,7 +84,7 @@ GEM
       mini_portile2 (~> 2.3.0)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     rack (2.0.5)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)