diff --git a/app/lib/carto/sgmap/api.rb b/app/lib/carto/sgmap/api.rb
index 9ab7a9d9e..e084caebd 100644
--- a/app/lib/carto/sgmap/api.rb
+++ b/app/lib/carto/sgmap/api.rb
@@ -3,13 +3,13 @@ class CARTO::SGMAP::API
   end
 
   def self.search_qp(geojson)
-    endpoint = "/quartiers-prioritaires/search"
-    call(base_url + endpoint, { geojson: geojson.to_s })
+    url = [API_CARTO_URL, "quartiers-prioritaires", "search"].join("/")
+    call(url, { geojson: geojson.to_s })
   end
 
   def self.search_cadastre(geojson)
-    endpoint = "/cadastre/geometrie"
-    call(base_url + endpoint, { geojson: geojson.to_s })
+    url = [API_CARTO_URL, "cadastre", "geometrie"].join("/")
+    call(url, { geojson: geojson.to_s })
   end
 
   private
@@ -25,8 +25,4 @@ class CARTO::SGMAP::API
   rescue RestClient::InternalServerError
     raise RestClient::ResourceNotFound
   end
-
-  def self.base_url
-    'https://apicarto.sgmap.fr'
-  end
 end
diff --git a/config/initializers/urls.rb b/config/initializers/urls.rb
index 82bdcf98f..f9419be37 100644
--- a/config/initializers/urls.rb
+++ b/config/initializers/urls.rb
@@ -1,3 +1,5 @@
+API_CARTO_URL = "https://apicarto.sgmap.fr"
+
 API_ENTREPRISE_URL = 'https://entreprise.api.gouv.fr/v2'
 
 PIPEDRIVE_API_URL = 'https://api.pipedrive.com/v1'