diff --git a/tfjm/settings.py b/tfjm/settings.py
index 24ccf7b..baabd14 100644
--- a/tfjm/settings.py
+++ b/tfjm/settings.py
@@ -24,7 +24,6 @@ PROJECT_DIR = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
 
 ADMINS = [("Emmy D'Anello", "emmy.danello@animath.fr")]
 
-
 # Quick-start development settings - unsuitable for production
 # See https://docs.djangoproject.com/en/3.0/howto/deployment/checklist/
 
@@ -38,7 +37,6 @@ SITE_ID = 1
 
 ALLOWED_HOSTS = ['*']
 
-
 # Application definition
 
 INSTALLED_APPS = [
@@ -122,7 +120,6 @@ FORM_RENDERER = 'django.forms.renderers.TemplatesSetting'
 ASGI_APPLICATION = 'tfjm.asgi.application'
 WSGI_APPLICATION = 'tfjm.wsgi.application'
 
-
 # Password validation
 # https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators
 
@@ -178,7 +175,6 @@ USE_TZ = True
 
 LOCALE_PATHS = [os.path.join(BASE_DIR, "locale")]
 
-
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/3.0/howto/static-files/
 
@@ -203,7 +199,10 @@ DJANGO_TABLES2_TEMPLATE = 'django_tables2/bootstrap5.html'
 
 HAYSTACK_CONNECTIONS = {
     'default': {
-        'ENGINE': 'haystack.backends.simple_backend.SimpleEngine',
+        'ENGINE': 'haystack.backends.elasticsearch7_backend.Elasticsearch7SearchEngine'
+        if os.getenv("HAYSTACK_INDEX_NAME", None) else 'haystack.backends.simple_backend.SimpleEngine',
+        'URL': 'http://elasticsearch:9200/',
+        'INDEX_NAME': os.getenv('HAYSTACK_INDEX_NAME', 'inscription-tfjm'),
     }
 }
 
@@ -274,6 +273,6 @@ CHANNEL_LAYERS = {
 }
 
 if os.getenv("TFJM_STAGE", "dev") == "prod":  # pragma: no cover
-    from .settings_prod import *    # noqa: F401,F403
+    from .settings_prod import *  # noqa: F401,F403
 else:
-    from .settings_dev import *     # noqa: F401,F403
+    from .settings_dev import *  # noqa: F401,F403
diff --git a/tfjm/settings_prod.py b/tfjm/settings_prod.py
index 198b2c4..1ef023f 100644
--- a/tfjm/settings_prod.py
+++ b/tfjm/settings_prod.py
@@ -38,12 +38,4 @@ CHANNEL_LAYERS = {
     },
 }
 
-HAYSTACK_CONNECTIONS = {
-    'default': {
-        'ENGINE': 'haystack.backends.elasticsearch7_backend.Elasticsearch7SearchEngine',
-        'URL': 'http://elasticsearch:9200/',
-        'INDEX_NAME': os.getenv('HAYSTACK_INDEX_NAME', 'inscription-tfjm'),
-    }
-}
-
 HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'