diff --git a/Gemfile.lock b/Gemfile.lock
index 8ee080403..2f8877c37 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -201,7 +201,7 @@ GEM
       uuid (~> 2.3, >= 2.3.8)
     diff-lcs (1.3)
     docile (1.3.2)
-    domain_name (0.5.20180417)
+    domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     encryptor (3.0.0)
     entypo-rails (3.0.0)