diff --git a/scripts/_common.sh b/scripts/_common.sh
index 4cf9df8..483a11d 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,7 +5,7 @@
 #=================================================
 
 # dependencies used by the app
-pkg_dependencies="libtinfo5 unzip ca-certificates swig libpq-dev postgresql postgresql-contrib postgresql-common ffmpeg libimage-exiftool-perl curl libopenblas-dev libmagic1 libboost-all-dev libxrender-dev liblapack-dev git bzip2 cmake build-essential libsm6 libglib2.0-0 libgl1-mesa-glx gfortran gunicorn libheif-dev libssl-dev rustc liblzma-dev python3 python3-pip python3-venv imagemagick xsel nodejs npm redis-server libmagickwand-dev libldap2-dev libsasl2-dev libvips42"
+pkg_dependencies="libtinfo5 unzip ca-certificates swig libpq-dev postgresql postgresql-contrib postgresql-common ffmpeg libimage-exiftool-perl curl libopenblas-dev libmagic1 libboost-all-dev libxrender-dev liblapack-dev git bzip2 cmake build-essential libsm6 libglib2.0-0 libgl1-mesa-glx gfortran gunicorn libheif-dev libssl-dev rustc liblzma-dev python3 python3-pip python3-venv imagemagick xsel redis-server libmagickwand-dev libldap2-dev libsasl2-dev libvips42"
 
 nodejs_version="14"
 
@@ -116,9 +116,9 @@ function set_up_frontend {
 	pushd $final_path/frontend
 		chown -R $app:$app $frontend_path
 		chown -R $app:$app $data_path
-		export NODE_OPTIONS="--max-old-space-size=8192"
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $ynh_npm install --legacy-peer-deps
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $ynh_npm run build
+		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $ynh_npm add serve
 		chown -R root:root $frontend_path
 		chown -R root:root $data_path
 	popd
@@ -136,19 +136,18 @@ function add_configuations {
 }
 
 function upgrade_db {
-	pushd "$final_path/backend"
-		chown -R $app:$app "$final_path/backend"
-		chown -R $app:$app "/var/log/$app"
-		ynh_exec_warn_less ynh_exec_as $app bash -c "
-			set -a
-			export PATH=\"$path_prefix:"'$PATH'"\"
-			source \"$final_path\"/librephotos.env
-			python3 manage.py showmigrations
-			python3 manage.py migrate 
-			python3 manage.py showmigrations
-		"
-	popd
-	set_permissions
+chown -R $app:$app "$final_path/backend"
+chown -R $app:$app "/var/log/$app"
+ynh_exec_warn_less ynh_exec_as $app bash -c "
+	source \"$final_path/backend/venv/bin/activate\"
+	set -a
+	source \"$final_path/librephotos.env\"
+	cd \"$final_path/backend\"
+	python3 manage.py showmigrations
+	python3 manage.py migrate 
+	python3 manage.py showmigrations
+"
+set_permissions
 }
 
 function set_permissions {
diff --git a/sources/patches/backend-00-settings.py.patch b/sources/patches/backend-00-settings.py.patch
index af3c8c3..238db55 100644
--- a/sources/patches/backend-00-settings.py.patch
+++ b/sources/patches/backend-00-settings.py.patch
@@ -19,18 +19,20 @@ index 3449af1..f1a6be7 100644
  
  CORS_ALLOW_HEADERS = (
      "cache-control",
-@@ -94,7 +95,9 @@
+@@ -94,7 +95,11 @@
      "x-requested-with",
  )
  
 -CORS_ORIGIN_WHITELIST = ("http://localhost:3000", "http://192.168.1.100:3000")
 +BACKEND_PORT=os.environ['httpPort']
 +
-+CORS_ORIGIN_WHITELIST = ('http://localhost:' + BACKEND_PORT)
++CORS_ORIGIN_WHITELIST = [
++    'http://localhost:' + BACKEND_PORT,
++]
  
  REST_FRAMEWORK = {
      "DEFAULT_PERMISSION_CLASSES": ("rest_framework.permissions.IsAuthenticated",),
-@@ -219,7 +222,7 @@
+@@ -219,7 +224,7 @@
  
  LANGUAGE_CODE = "en-us"
  
@@ -39,7 +41,7 @@ index 3449af1..f1a6be7 100644
  
  USE_I18N = True
  
-@@ -258,8 +261,8 @@
+@@ -258,8 +263,8 @@
  CORS_ORIGIN_ALLOW_ALL = False
  CORS_ALLOW_CREDENTIALS = True
  
@@ -50,7 +52,7 @@ index 3449af1..f1a6be7 100644
  
  # Must be less or egal of nb core CPU ( Nearly 2GB per process)
  HEAVYWEIGHT_PROCESS_ENV = os.environ.get("HEAVYWEIGHT_PROCESS", "1")
-@@ -282,3 +285,12 @@
+@@ -282,3 +287,12 @@
          },
      },
  }