diff --git a/api/advent22_api/config.py b/api/advent22_api/config.py
index 2e6fa18..287a318 100644
--- a/api/advent22_api/config.py
+++ b/api/advent22_api/config.py
@@ -62,7 +62,12 @@ async def get_config() -> Config:
 
 
 async def set_config(cfg: Config) -> None:
-    txt = tomli_w.dumps(cfg.model_dump())
+    txt = tomli_w.dumps(
+        cfg.model_dump(
+            exclude_defaults=True,
+            exclude_unset=True,
+        )
+    )
 
     await dav_write_textfile_content(
         path=SETTINGS.config_filename,