diff --git a/Libraries/Core/Services/OpenZoneService.cs b/Libraries/Core/Services/OpenZoneService.cs
index e59e245e..38ecfe24 100644
--- a/Libraries/Core/Services/OpenZoneService.cs
+++ b/Libraries/Core/Services/OpenZoneService.cs
@@ -11,22 +11,18 @@ public class OpenZoneService(
     DatabaseService _databaseService,
     LocalisationService _localisationService,
     ConfigServer _configServer
-    )
+)
 {
     protected LocationConfig _locationConfig = _configServer.GetConfig<LocationConfig>();
 
     /// <summary>
-    /// Add open zone to specified map
+    ///     Add open zone to specified map
     /// </summary>
     /// <param name="locationId">map location (e.g. factory4_day)</param>
     /// <param name="zoneToAdd">zone to add</param>
     public void AddZoneToMap(string locationId, string zoneToAdd)
     {
-        var location = _locationConfig.OpenZones[locationId];
-        if (location is null)
-        {
-            _locationConfig.OpenZones[locationId] = [];
-        }
+        _locationConfig.OpenZones.TryAdd(locationId, []);
 
         if (!_locationConfig.OpenZones[locationId].Contains(zoneToAdd))
         {
@@ -35,12 +31,13 @@ public class OpenZoneService(
     }
 
     /// <summary>
-    /// Add open zones to all maps found in config/location.json to db
+    ///     Add open zones to all maps found in config/location.json to db
     /// </summary>
     public void ApplyZoneChangesToAllMaps()
     {
         var dbLocations = _databaseService.GetLocations().GetDictionary();
-        foreach (var mapKvP in _locationConfig.OpenZones) {
+        foreach (var mapKvP in _locationConfig.OpenZones)
+        {
             if (!dbLocations.ContainsKey(mapKvP.Key))
             {
                 _logger.Error(_localisationService.GetText("openzone-unable_to_find_map", mapKvP));