diff --git a/app/controllers/proposals_controller.rb b/app/controllers/proposals_controller.rb
index 938e38574..c54954d4e 100644
--- a/app/controllers/proposals_controller.rb
+++ b/app/controllers/proposals_controller.rb
@@ -60,7 +60,7 @@ class ProposalsController < ApplicationController
   private
 
     def proposal_params
-      params.require(:proposal).permit(:title, :question, :description, :tag_list, :terms_of_service, :captcha, :captcha_key)
+      params.require(:proposal).permit(:title, :question, :description, :external_url, :tag_list, :terms_of_service, :captcha, :captcha_key)
     end
 
     def load_featured_tags
diff --git a/app/views/proposals/_form.html.erb b/app/views/proposals/_form.html.erb
index 8d02b4a75..5607354fc 100644
--- a/app/views/proposals/_form.html.erb
+++ b/app/views/proposals/_form.html.erb
@@ -17,6 +17,11 @@
       <%= f.cktext_area :description, maxlength: Proposal.description_max_length, ckeditor: { language: I18n.locale }, label: false %>
     </div>
 
+    <div class="small-12 column">
+      <%= f.label :external_url, t("proposals.form.proposal_external_url") %>
+      <%= f.text_field :external_url, placeholder: t("proposals.form.proposal_external_url"), label: false %>
+    </div>
+
     <div class="small-12 column">
       <%= f.label :tag_list, t("proposals.form.tags_label") %>
       <span class="note"><%= t("proposals.form.tags_instructions") %></span>
diff --git a/app/views/proposals/show.html.erb b/app/views/proposals/show.html.erb
index b25bf3277..82089fa41 100644
--- a/app/views/proposals/show.html.erb
+++ b/app/views/proposals/show.html.erb
@@ -57,6 +57,7 @@
       </div>
 
       <%= @proposal.description %>
+      <%= @proposal.external_url %>
 
       <%= render 'shared/tags', proposal: @proposal %>