diff --git a/app/models/widget/card.rb b/app/models/widget/card.rb
index fa8b2f8e7..01b00a1c1 100644
--- a/app/models/widget/card.rb
+++ b/app/models/widget/card.rb
@@ -9,6 +9,7 @@ class Widget::Card < ApplicationRecord
   include Globalizable
 
   validates_translation :title, presence: true
+  validates :link_url, presence: true, if: -> { !header? }
 
   def self.header
     where(header: true)
diff --git a/db/dev_seeds/sdg.rb b/db/dev_seeds/sdg.rb
index f7fe40a3a..8381f01fb 100644
--- a/db/dev_seeds/sdg.rb
+++ b/db/dev_seeds/sdg.rb
@@ -33,6 +33,7 @@ end
 
 section "Creating SDG homepage cards" do
   SDG::Phase.all.each do |phase|
-    Widget::Card.create!(cardable: phase, title: "#{phase.title} card")
+    Widget::Card.create!(cardable: phase, title: "#{phase.title} card",
+                        link_text: "Link Text", link_url: "/any_path")
   end
 end
diff --git a/spec/models/widget/card_spec.rb b/spec/models/widget/card_spec.rb
index 2dea5b38e..c031ed615 100644
--- a/spec/models/widget/card_spec.rb
+++ b/spec/models/widget/card_spec.rb
@@ -17,6 +17,14 @@ describe Widget::Card do
     it "is not valid without a title" do
       expect(build(:widget_card, title: "")).not_to be_valid
     end
+
+    context "regular cards" do
+      it "is not valid without a link_url" do
+        card = build(:widget_card, header: false, link_url: nil)
+
+        expect(card).not_to be_valid
+      end
+    end
   end
 
   describe "#header" do
diff --git a/spec/system/admin/widgets/cards_spec.rb b/spec/system/admin/widgets/cards_spec.rb
index 1621d90a6..4f7477142 100644
--- a/spec/system/admin/widgets/cards_spec.rb
+++ b/spec/system/admin/widgets/cards_spec.rb
@@ -172,6 +172,7 @@ describe "Cards", :admin do
           href: admin_site_customization_page_widget_cards_path(custom_page))
 
         fill_in "Title", with: "Card for a custom page"
+        fill_in "Link URL", with: "/any_path"
         click_button "Create card"
 
         expect(page).to have_current_path admin_site_customization_page_widget_cards_path(custom_page)
diff --git a/spec/system/sdg_management/homepage_spec.rb b/spec/system/sdg_management/homepage_spec.rb
index 6f8428b25..1fb339d5a 100644
--- a/spec/system/sdg_management/homepage_spec.rb
+++ b/spec/system/sdg_management/homepage_spec.rb
@@ -22,6 +22,7 @@ describe "SDG homepage configuration" do
       click_link "Create planning card"
 
       within(".translatable-fields") { fill_in "Title", with: "My planning card" }
+      fill_in "Link URL", with: "/any_path"
       click_button "Create card"
 
       within(".planning-cards") do
@@ -54,6 +55,7 @@ describe "SDG homepage configuration" do
       click_link "Create header"
 
       within(".translatable-fields") { fill_in "Title", with: "My header" }
+      fill_in "Link URL", with: "/any_path"
       click_button "Create card"
 
       within(".sdg-header") do