diff --git a/Gemfile.lock b/Gemfile.lock
index 920509a88..3099dbb60 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -182,7 +182,7 @@ GEM
       uuid (~> 2.3, >= 2.3.8)
     diff-lcs (1.3)
     docile (1.3.1)
-    domain_name (0.5.20170404)
+    domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
     entypo-rails (3.0.0)
       railties (>= 4.1, < 6)