diff --git a/nyacme/config.py b/nyacme/config.py
index 34213d0..7043cdd 100644
--- a/nyacme/config.py
+++ b/nyacme/config.py
@@ -38,7 +38,7 @@ def read_config(path: Optional[str]) -> Config:
         raw_conf = tomllib.load(file)
 
     for key in raw_conf:
-        if key not in ('domains', 'secrets'):
+        if key not in ('domains', 'secrets', 'post_acquire', 'acme_path'):
             log.warning('unknown config key: %s', key)
 
     c = Config()
diff --git a/nyacme/handlers/base.py b/nyacme/handlers/base.py
index 78105df..356b852 100644
--- a/nyacme/handlers/base.py
+++ b/nyacme/handlers/base.py
@@ -1,5 +1,7 @@
 import logging
 
+from ..config import Config
+
 class Handler:
     zone: str
     config: Config
diff --git a/nyacme/handlers/hetzner.py b/nyacme/handlers/hetzner.py
index 7148b8a..609b248 100644
--- a/nyacme/handlers/hetzner.py
+++ b/nyacme/handlers/hetzner.py
@@ -3,6 +3,7 @@ import json
 from typing import Optional, Any
 
 from .base import Handler
+from ..config import Config
 
 class HetznerHandler(Handler):
     # discovered