diff --git a/src/config.py b/src/config.py
index a09f5d6..a71c4f7 100644
--- a/src/config.py
+++ b/src/config.py
@@ -46,9 +46,9 @@ config = get_config()
 
 
 LOG_LEVEL = config("LOG_LEVEL", default="INFO")
-ENV = config("ENV", default="local")
+ENV = config("ENV")
 PORT = config("PORT", cast=int)
-HOST = config("HOST", default="localhost")
+HOST = config("HOST")
 
 
 # database
@@ -65,7 +65,7 @@ DATABASE_ENGINE_MAX_OVERFLOW = config(
 )
 
 COLLECTOR_HOSTNAME = config("COLLECTOR_HOSTNAME")
-COLLECTOR_PORT = config("COLLECTOR_PORT", default="5432")
+COLLECTOR_PORT = config("COLLECTOR_PORT", cast=int)
 COLLECTOR_CREDENTIAL_USER = config("COLLECTOR_CREDENTIAL_USER")
 COLLECTOR_CREDENTIAL_PASSWORD = config("COLLECTOR_CREDENTIAL_PASSWORD")
 QUOTED_COLLECTOR_CREDENTIAL_PASSWORD = parse.quote(str(COLLECTOR_CREDENTIAL_PASSWORD))
@@ -76,10 +76,10 @@ SQLALCHEMY_DATABASE_URI = f"postgresql+asyncpg://{_DATABASE_CREDENTIAL_USER}:{_Q
 SQLALCHEMY_COLLECTOR_URI = f"postgresql+asyncpg://{COLLECTOR_CREDENTIAL_USER}:{QUOTED_COLLECTOR_CREDENTIAL_PASSWORD}@{COLLECTOR_HOSTNAME}:{COLLECTOR_PORT}/{COLLECTOR_NAME}"
 
 
-TIMEZONE = "Asia/Jakarta"
+TIMEZONE = config("TIMEZONE")
 
-MAXIMO_BASE_URL = config("MAXIMO_BASE_URL", default="http://example.com")
-MAXIMO_API_KEY = config("MAXIMO_API_KEY", default="keys")
+MAXIMO_BASE_URL = config("MAXIMO_BASE_URL")
+MAXIMO_API_KEY = config("MAXIMO_API_KEY")
 
 AUTH_SERVICE_API = config("AUTH_SERVICE_API")
 REALIBILITY_SERVICE_API = config("REALIBILITY_SERVICE_API")