diff --git a/Gemfile.lock b/Gemfile.lock
index 2410bb8..a74ccc9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     autoprefixer-rails (6.7.7.2)
       execjs
     backports (3.12.0)
@@ -90,7 +90,7 @@ GEM
     padrino-support (0.13.3.4)
       activesupport (>= 3.1)
     parallel (1.14.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rack (2.2.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)