diff --git a/Gemfile.lock b/Gemfile.lock
index c03650ce..400e77f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,7 +45,8 @@ GEM
       tzinfo (~> 1.1)
     acts-as-taggable-on (3.5.0)
       activerecord (>= 3.2, < 5)
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     annotate (2.6.10)
       activerecord (>= 3.2, <= 4.3)
       rake (~> 10.4)
@@ -186,6 +187,7 @@ GEM
       omniauth (~> 1.2.0)
     pg (0.18.4)
     pothoven-attachment_fu (3.2.16)
+    public_suffix (3.1.1)
     rack (1.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)