diff --git a/Gemfile.lock b/Gemfile.lock
index bcb0d8319..d59e44b8b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,8 +58,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     administrate (0.12.0)
       actionpack (>= 4.2)
       actionview (>= 4.2)
@@ -342,7 +342,7 @@ GEM
     pry-stack_explorer (0.4.9.3)
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
-    public_suffix (4.0.3)
+    public_suffix (5.0.0)
     puffing-billy (2.3.1)
       addressable (~> 2.5)
       em-http-request (~> 1.1, >= 1.1.0)