diff --git a/Gemfile b/Gemfile
index 49563cb..785d6a2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,6 +24,8 @@ gem 'turbolinks'
 # Assets
 gem 'foundation-rails'
 
+gem 'validate_url'
+
 # Authentication
 gem 'omniauth'
 gem 'omniauth-browserid'
@@ -63,4 +65,3 @@ end
 
 # Use debugger
 # gem 'debugger', group: [:development, :test]
-
diff --git a/Gemfile.lock b/Gemfile.lock
index 7d992bb..70404da 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -200,6 +200,9 @@ GEM
     uglifier (2.7.1)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
+    validate_url (1.0.2)
+      activemodel (>= 3.0.0)
+      addressable
     xpath (2.0.0)
       nokogiri (~> 1.3)
 
@@ -233,3 +236,4 @@ DEPENDENCIES
   sqlite3
   turbolinks
   uglifier
+  validate_url