diff --git a/src/main/java/de/ph87/homeautomation/DemoDataService.java b/src/main/java/de/ph87/homeautomation/DemoDataService.java
index 53c6036..3dfbd69 100644
--- a/src/main/java/de/ph87/homeautomation/DemoDataService.java
+++ b/src/main/java/de/ph87/homeautomation/DemoDataService.java
@@ -81,7 +81,7 @@ public class DemoDataService {
     scheduleEntryController.setEnabled(id, enabled);
     scheduleEntryController.setType(id, type.name());
     if (zenith != null) {
-      scheduleEntryController.setZenith(id, zenith.degrees().doubleValue());
+      scheduleEntryController.setZenith(id, zenith.degrees() + "");
     }
     scheduleEntryController.setHour(id, hour);
     scheduleEntryController.setMinute(id, minute);
diff --git a/src/main/java/de/ph87/homeautomation/schedule/entry/ScheduleEntryController.java b/src/main/java/de/ph87/homeautomation/schedule/entry/ScheduleEntryController.java
index a00771a..67b3dee 100644
--- a/src/main/java/de/ph87/homeautomation/schedule/entry/ScheduleEntryController.java
+++ b/src/main/java/de/ph87/homeautomation/schedule/entry/ScheduleEntryController.java
@@ -72,8 +72,8 @@ public class ScheduleEntryController {
   }
 
   @PostMapping("set/{id}/zenith")
-  public ScheduleEntryDto setZenith(@PathVariable final long id, @RequestBody final double value) {
-    return scheduleEntryWriteService.set(id, ScheduleEntry::setZenith, value);
+  public ScheduleEntryDto setZenith(@PathVariable final long id, @RequestBody final String value) {
+    return scheduleEntryWriteService.set(id, ScheduleEntry::setZenith, Double.parseDouble(value));
   }
 
   @PostMapping("set/{id}/hour")