diff --git a/flaschengeist/config.py b/flaschengeist/config.py
index cda1e4f..100d6e3 100644
--- a/flaschengeist/config.py
+++ b/flaschengeist/config.py
@@ -1,24 +1,37 @@
-import logging.config
 import os
 import toml
+import logging.config
+import collections.abc
+
 from pathlib import Path
 from werkzeug.middleware.proxy_fix import ProxyFix
 from flaschengeist import _module_path, logger
 
+
+def __update(d, u):
+    for k, v in u.items():
+        if isinstance(v, collections.abc.Mapping):
+            d[k] = __update(d.get(k, {}), v)
+        else:
+            d[k] = v
+    return d
+
+
 # Default config:
 config = {}
-paths = [_module_path, Path.home() / ".config"]
+
+__paths = [_module_path, Path.home() / ".config"]
 if "FLASCHENGEIST_CONF" in os.environ:
-    paths.append(Path(os.environ.get("FLASCHENGEIST_CONF")))
-for loc in paths:
+    __paths.append(Path(os.environ.get("FLASCHENGEIST_CONF")))
+for loc in __paths:
     try:
         with (loc / "flaschengeist.toml").open() as source:
             logger.info("Reading config file from >{}<".format(loc))
-            config.update(toml.load(source))
+            __update(config, toml.load(source))
     except IOError:
         pass
 # Always enable this builtin plugins!
-config.update({"auth": {"enabled": True}, "roles": {"enabled": True}, "users": {"enabled": True}})
+__update(config, {"auth": {"enabled": True}, "roles": {"enabled": True}, "users": {"enabled": True}})
 
 
 def configure_app(app):