diff --git a/app/controllers/admin/procedures_controller.rb b/app/controllers/admin/procedures_controller.rb
index 8372a2535..ff3024464 100644
--- a/app/controllers/admin/procedures_controller.rb
+++ b/app/controllers/admin/procedures_controller.rb
@@ -107,19 +107,20 @@ class Admin::ProceduresController < AdminController
 
   def publish
     path = params[:path]
+    lien_site_web = params[:lien_site_web]
     procedure = current_administrateur.procedures.find(params[:procedure_id])
 
     procedure.path = path
-    procedure.lien_site_web = params[:lien_site_web]
+    procedure.lien_site_web = lien_site_web
 
     if !procedure.validate
-      flash.alert = 'Lien de la démarche invalide'
+      flash.alert = 'Lien de la démarche invalide ou lien vers la démarche manquant'
       return redirect_to admin_procedures_path
     else
       procedure.path = nil
     end
 
-    if procedure.publish_or_reopen!(current_administrateur, path)
+    if procedure.publish_or_reopen!(current_administrateur, path, lien_site_web)
       flash.notice = "Démarche publiée"
       redirect_to admin_procedures_path
     else
diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 4f36161dd..9ec30cef6 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -107,12 +107,12 @@ class Procedure < ApplicationRecord
     end
   end
 
-  def publish_or_reopen!(administrateur, path)
-    if archivee? && may_reopen?(administrateur, path)
-      reopen!(administrateur, path)
-    elsif may_publish?(administrateur, path)
+  def publish_or_reopen!(administrateur, path, lien_site_web)
+    if archivee? && may_reopen?(administrateur, path, lien_site_web)
+      reopen!(administrateur, path, lien_site_web)
+    elsif may_publish?(administrateur, path, lien_site_web)
       reset!
-      publish!(administrateur, path)
+      publish!(administrateur, path, lien_site_web)
     end
   end
 
@@ -488,21 +488,17 @@ class Procedure < ApplicationRecord
     update!(path: path)
   end
 
-  def can_publish?(administrateur, path)
-    path_availability(administrateur, path).in?(PATH_CAN_PUBLISH)
+  def can_publish?(administrateur, path, lien_site_web)
+    path_availability(administrateur, path).in?(PATH_CAN_PUBLISH) && lien_site_web.present?
   end
 
-  def can_reopen?(administrateur, path)
-    path_availability(administrateur, path).in?(PATH_CAN_PUBLISH)
-  end
-
-  def after_publish(administrateur, path)
+  def after_publish(administrateur, path, lien_site_web)
     update!(published_at: Time.zone.now)
 
     claim_path_ownership!(path)
   end
 
-  def after_reopen(administrateur, path)
+  def after_reopen(administrateur, path, lien_site_web)
     update!(published_at: Time.zone.now, archived_at: nil)
 
     claim_path_ownership!(path)
diff --git a/app/views/admin/procedures/_informations.html.haml b/app/views/admin/procedures/_informations.html.haml
index 437e83dd4..c2d1477a2 100644
--- a/app/views/admin/procedures/_informations.html.haml
+++ b/app/views/admin/procedures/_informations.html.haml
@@ -19,7 +19,7 @@
     = f.label :duree_conservation_dossiers_hors_ds, "Hors demarches-simplifiees.fr* (durée en mois après la fin de l'instruction)"
     = f.number_field :duree_conservation_dossiers_hors_ds, class: 'form-control', placeholder: '6', required: true
 
-- if @procedure.locked?
+- if @procedure.new?
   .form-group
     %h4 Où les usagers trouveront-ils le lien vers la démarche ?
     = f.text_field :lien_site_web, class: 'form-control', placeholder: 'https://exemple.gouv.fr/ma_demarche'
diff --git a/app/views/admin/procedures/_modal_publish.html.haml b/app/views/admin/procedures/_modal_publish.html.haml
index 0df3e7bf9..102e0c234 100644
--- a/app/views/admin/procedures/_modal_publish.html.haml
+++ b/app/views/admin/procedures/_modal_publish.html.haml
@@ -39,9 +39,12 @@
                 target: "_blank"
 
           .form-group
-            %h4 Où les usagers trouveront-ils le lien vers cette démarche ?
+            %h4 Où les usagers trouveront-ils le lien vers cette démarche ? *
             %p.center
-              = text_field_tag(:lien_site_web, @procedure.lien_site_web, class: 'form-control', placeholder: 'https://exemple.gouv.fr/ma_demarche')
+              = text_field_tag(:lien_site_web, @procedure.lien_site_web,
+                                required: true,
+                                class: 'form-control',
+                                placeholder: 'https://exemple.gouv.fr/ma_demarche')
 
             #path-messages
               #path_is_mine.text-warning.center.message
diff --git a/spec/controllers/admin/procedures_controller_spec.rb b/spec/controllers/admin/procedures_controller_spec.rb
index 4ec06a296..6f22b7ad3 100644
--- a/spec/controllers/admin/procedures_controller_spec.rb
+++ b/spec/controllers/admin/procedures_controller_spec.rb
@@ -15,6 +15,7 @@ describe Admin::ProceduresController, type: :controller do
   let(:duree_conservation_dossiers_dans_ds) { 3 }
   let(:duree_conservation_dossiers_hors_ds) { 6 }
   let(:monavis_embed) { nil }
+  let(:lien_site_web) { 'http://mon-site.gouv.fr' }
 
   let(:procedure_params) {
     {
@@ -26,7 +27,8 @@ describe Admin::ProceduresController, type: :controller do
       cadre_juridique: cadre_juridique,
       duree_conservation_dossiers_dans_ds: duree_conservation_dossiers_dans_ds,
       duree_conservation_dossiers_hors_ds: duree_conservation_dossiers_hors_ds,
-      monavis_embed: monavis_embed
+      monavis_embed: monavis_embed,
+      lien_site_web: lien_site_web
     }
   }
 
@@ -331,9 +333,10 @@ describe Admin::ProceduresController, type: :controller do
   end
 
   describe 'PUT #publish' do
-    let(:procedure) { create(:procedure, administrateur: admin) }
-    let(:procedure2) { create(:procedure, :published, administrateur: admin) }
-    let(:procedure3) { create(:procedure, :published) }
+    let(:lien_site_web) { 'http://mon-site.gouv.fr' }
+    let(:procedure) { create(:procedure, administrateur: admin, lien_site_web: nil) }
+    let(:procedure2) { create(:procedure, :published, administrateur: admin, lien_site_web: lien_site_web) }
+    let(:procedure3) { create(:procedure, :published, lien_site_web: lien_site_web) }
     let(:lien_site_web) { 'http://some.administration/' }
 
     context 'when admin is the owner of the procedure' do
@@ -400,6 +403,17 @@ describe Admin::ProceduresController, type: :controller do
           expect(flash[:alert]).to have_content 'Lien de la démarche invalide'
         end
       end
+
+      context 'procedure path is valid but lien_site_web is missing' do
+        let(:path) { 'new_path' }
+        let(:lien_site_web) { nil }
+
+        it 'does not publish the given procedure' do
+          expect(procedure.publiee?).to be_falsey
+          expect(flash[:alert]).to have_content 'Lien de la démarche invalide'
+          expect(response).to redirect_to :admin_procedures
+        end
+      end
     end
 
     context 'when admin is not the owner of the procedure' do
@@ -421,7 +435,7 @@ describe Admin::ProceduresController, type: :controller do
   end
 
   describe 'PUT #archive' do
-    let(:procedure) { create(:procedure, :published, administrateur: admin) }
+    let(:procedure) { create(:procedure, :published, administrateur: admin, lien_site_web: lien_site_web) }
 
     context 'when admin is the owner of the procedure' do
       before do
@@ -437,7 +451,7 @@ describe Admin::ProceduresController, type: :controller do
 
       context 'when owner want to re-enable procedure' do
         before do
-          put :publish, params: { procedure_id: procedure.id, path: 'fake_path' }
+          put :publish, params: { procedure_id: procedure.id, path: 'fake_path', lien_site_web: lien_site_web }
           procedure.reload
         end
 
diff --git a/spec/factories/procedure.rb b/spec/factories/procedure.rb
index 2e5bd901d..cc9be67ec 100644
--- a/spec/factories/procedure.rb
+++ b/spec/factories/procedure.rb
@@ -10,6 +10,7 @@ FactoryBot.define do
     duree_conservation_dossiers_dans_ds { 3 }
     duree_conservation_dossiers_hors_ds { 6 }
     ask_birthday { false }
+    lien_site_web { "https://mon-site.gouv" }
 
     transient do
       administrateur {}
@@ -147,13 +148,13 @@ FactoryBot.define do
 
     trait :published do
       after(:build) do |procedure, _evaluator|
-        procedure.publish!(procedure.administrateurs.first, generate(:published_path))
+        procedure.publish!(procedure.administrateurs.first, generate(:published_path), procedure.lien_site_web)
       end
     end
 
     trait :archived do
       after(:build) do |procedure, _evaluator|
-        procedure.publish!(procedure.administrateurs.first, generate(:published_path))
+        procedure.publish!(procedure.administrateurs.first, generate(:published_path), procedure.lien_site_web)
         procedure.archive!
       end
     end
@@ -162,14 +163,14 @@ FactoryBot.define do
       # For now the behavior is the same than :archived
       # (it may be different in the future though)
       after(:build) do |procedure, _evaluator|
-        procedure.publish!(procedure.administrateurs.first, generate(:published_path))
+        procedure.publish!(procedure.administrateurs.first, generate(:published_path), procedure.lien_site_web)
         procedure.archive!
       end
     end
 
     trait :hidden do
       after(:build) do |procedure, _evaluator|
-        procedure.publish!(procedure.administrateurs.first, generate(:published_path))
+        procedure.publish!(procedure.administrateurs.first, generate(:published_path), procedure.lien_site_web)
         procedure.hide!
       end
     end
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index 81f94e500..d677a93bb 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -554,7 +554,7 @@ describe Procedure do
 
     before do
       Timecop.freeze(now)
-      procedure.publish!(procedure.administrateurs.first, "example-path")
+      procedure.publish!(procedure.administrateurs.first, "example-path", procedure.lien_site_web)
     end
     after { Timecop.return }