diff --git a/Gemfile.lock b/Gemfile.lock
index 6d7ffafa..8cfa596f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,8 +81,8 @@ GEM
       activerecord (>= 4.2.8)
     acts_as_list (0.9.19)
       activerecord (>= 3.0)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     airbrussh (1.3.2)
       sshkit (>= 1.6.1, != 1.7.0)
     annotate (2.7.5)
@@ -332,7 +332,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.1.1)
+    public_suffix (4.0.6)
     puma (4.3.5)
       nio4r (~> 2.0)
     rabl (0.14.1)