diff --git a/src/wce_crm/constants.py b/src/wce_crm/constants.py
index 8df5466..e555c32 100644
--- a/src/wce_crm/constants.py
+++ b/src/wce_crm/constants.py
@@ -17,7 +17,7 @@ assert BASE_PATH
 
 
 class Config:
-    DEVELOPMENT_STATE: bool = bool(os.getenv("DOPT_DEVELOPMENT", "0"))
+    DEVELOPMENT_STATE: bool = bool(os.getenv("DOPT_DEVELOPMENT", None))
     DB_PATH_CRM: Path = BASE_PATH / os.getenv("DOPT_DB_CRM", "data/db/wce_crm.db")
     DB_PATH_MAIN: Path = BASE_PATH / os.getenv(
         "DOPT_DB_MAIN", "data/db/wce_grunderfassung.db"