diff --git a/src/dstack/_internal/server/services/config.py b/src/dstack/_internal/server/services/config.py
index 7f4d0bc37..a7d2db2c7 100644
--- a/src/dstack/_internal/server/services/config.py
+++ b/src/dstack/_internal/server/services/config.py
@@ -272,7 +272,7 @@ def seq_representer(dumper, sequence):
         yaml.add_representer(list, seq_representer)
 
         with open(settings.SERVER_CONFIG_FILE_PATH, "w+") as f:
-            yaml.dump(config.dict(), f, sort_keys=False)
+            yaml.dump(config.dict(exclude_none=True), f, sort_keys=False)
 
 
 server_config_manager = ServerConfigManager()