diff --git a/documentation/Architecture.pptx b/documentation/Architecture.pptx
index e9387a9..c700102 100644
Binary files a/documentation/Architecture.pptx and b/documentation/Architecture.pptx differ
diff --git a/production/api/app/http_service.py b/production/api/app/http_service.py
index 4096cb1..1e715fb 100644
--- a/production/api/app/http_service.py
+++ b/production/api/app/http_service.py
@@ -16,6 +16,7 @@ def post(self, url, data, headers={}):
 def http_service_factory_get():
     http_service = None
     def get():
+        nonlocal http_service
         if http_service is None:
             http_service = HttpService()
         return http_service
diff --git a/production/api/app/redis_client.py b/production/api/app/redis_client.py
index faf94b9..a9b46bf 100644
--- a/production/api/app/redis_client.py
+++ b/production/api/app/redis_client.py
@@ -20,6 +20,7 @@ def redis_factory_get(host:str, port:int):
     redis_instance = None
 
     def get():
+        nonlocal redis_instance
         if redis_instance is None:
             redis_instance = RedisClient(host, port)
         return redis_instance
diff --git a/production/ia-worker/app/app_settings.py b/production/ia-worker/app/app_settings.py
index 0139368..0875d40 100644
--- a/production/ia-worker/app/app_settings.py
+++ b/production/ia-worker/app/app_settings.py
@@ -62,6 +62,7 @@ def init_settings_environments(settings: dict) -> dict:
 def app_settings_factory_get():
     app_settings_instance = None
     def get():
+        nonlocal app_settings_instance
         if app_settings_instance is not None:
             return app_settings_instance
 
diff --git a/production/ia-worker/app/http_service.py b/production/ia-worker/app/http_service.py
index 4096cb1..1e715fb 100644
--- a/production/ia-worker/app/http_service.py
+++ b/production/ia-worker/app/http_service.py
@@ -16,6 +16,7 @@ def post(self, url, data, headers={}):
 def http_service_factory_get():
     http_service = None
     def get():
+        nonlocal http_service
         if http_service is None:
             http_service = HttpService()
         return http_service
diff --git a/production/ia-worker/app/redis_client.py b/production/ia-worker/app/redis_client.py
index faf94b9..a9b46bf 100644
--- a/production/ia-worker/app/redis_client.py
+++ b/production/ia-worker/app/redis_client.py
@@ -20,6 +20,7 @@ def redis_factory_get(host:str, port:int):
     redis_instance = None
 
     def get():
+        nonlocal redis_instance
         if redis_instance is None:
             redis_instance = RedisClient(host, port)
         return redis_instance