diff --git a/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/HeadwindDirectionDataType.kt b/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/HeadwindDirectionDataType.kt
index 832532c..a5bf09b 100644
--- a/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/HeadwindDirectionDataType.kt
+++ b/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/HeadwindDirectionDataType.kt
@@ -60,7 +60,7 @@ class HeadwindDirectionDataType(
         return flow {
             while (true) {
                 val bearing = (0..360).random().toDouble()
-                val windSpeed = (-20..20).random()
+                val windSpeed = (0..20).random()
 
                 emit(StreamData(HeadingResponse.Value(bearing), bearing, windSpeed.toDouble(), HeadwindSettings()))
                 delay(2_000)
diff --git a/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/TailwindAndRideSpeedDataType.kt b/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/TailwindAndRideSpeedDataType.kt
index 7f19ae3..161f98b 100644
--- a/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/TailwindAndRideSpeedDataType.kt
+++ b/app/src/main/kotlin/de/timklge/karooheadwind/datatypes/TailwindAndRideSpeedDataType.kt
@@ -95,7 +95,7 @@ class TailwindAndRideSpeedDataType(
         return flow {
             while (true) {
                 val bearing = (0..360).random().toDouble()
-                val windSpeed = (-20..20).random()
+                val windSpeed = (0..20).random()
                 val rideSpeed = (10..40).random().toDouble()
 
                 emit(StreamData(HeadingResponse.Value(bearing), bearing, windSpeed.toDouble(), HeadwindSettings(), rideSpeed))