diff --git a/lib/service/configuration_service.dart b/lib/service/configuration_service.dart
index 7da2ca6..083b7fb 100644
--- a/lib/service/configuration_service.dart
+++ b/lib/service/configuration_service.dart
@@ -4,7 +4,12 @@ class ConfigurationService {
   final EngineService engineService;
 
   bool showGrid;
-  int simSpeed;
+
+  int _simSpeed;
+  int get simSpeed => _simSpeed;
+  void set simSpeed(int val) {
+    _simSpeed = 5;
+  }
 
   ConfigurationService(this.engineService) {
     showGrid = false;