diff --git a/app/build.gradle b/app/build.gradle
index 0c88818..483cfd0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -14,8 +14,8 @@ android {
         applicationId "com.tiefensuche.motionmate"
         minSdkVersion 14
         targetSdkVersion 28
-        versionCode 6
-        versionName "1.3"
+        versionCode 7
+        versionName "1.3.1"
         proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
     }
     signingConfigs {
diff --git a/app/src/main/java/com/tiefensuche/motionmate/service/MotionService.kt b/app/src/main/java/com/tiefensuche/motionmate/service/MotionService.kt
index 49f95ca..9da58fe 100644
--- a/app/src/main/java/com/tiefensuche/motionmate/service/MotionService.kt
+++ b/app/src/main/java/com/tiefensuche/motionmate/service/MotionService.kt
@@ -77,7 +77,7 @@ internal class MotionService : Service() {
         val manager = packageManager
 
         // connect sensor
-        val mSensorManager = getSystemService(Context.SENSOR_SERVICE) as? SensorManager ?: throw RuntimeException()
+        val mSensorManager = getSystemService(Context.SENSOR_SERVICE) as? SensorManager ?: throw IllegalStateException("could not get sensor service")
         var mStepSensor: Sensor? = null
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && manager.hasSystemFeature(PackageManager.FEATURE_SENSOR_STEP_COUNTER)) {
             // androids built in step counter
@@ -90,7 +90,7 @@ internal class MotionService : Service() {
                 }
 
                 override fun onAccuracyChanged(sensor: Sensor, accuracy: Int) {
-
+                    // no-op
                 }
             }
         } else if (manager.hasSystemFeature(PackageManager.FEATURE_SENSOR_ACCELEROMETER)) {
@@ -112,7 +112,7 @@ internal class MotionService : Service() {
                 }
 
                 override fun onAccuracyChanged(sensor: Sensor, accuracy: Int) {
-
+                    // no-op
                 }
             }
         }
@@ -196,7 +196,7 @@ internal class MotionService : Service() {
     }
 
     private fun startService() {
-        mNotificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as? NotificationManager ?: throw RuntimeException()
+        mNotificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as? NotificationManager ?: throw IllegalStateException("could not get notification service")
         val notificationIntent = Intent(this, MainActivity::class.java)
         val pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0)
         // Notification channels are only supported on Android O+.
diff --git a/app/src/main/java/com/tiefensuche/motionmate/util/Database.kt b/app/src/main/java/com/tiefensuche/motionmate/util/Database.kt
index 22412c4..182185c 100644
--- a/app/src/main/java/com/tiefensuche/motionmate/util/Database.kt
+++ b/app/src/main/java/com/tiefensuche/motionmate/util/Database.kt
@@ -27,7 +27,7 @@ internal class Database private constructor(context: Context) : SQLiteOpenHelper
             FIELD_TYPE_INTEGER -> cursor.getLong(0)
             FIELD_TYPE_FLOAT -> cursor.getFloat(0)
             FIELD_TYPE_NULL -> 0
-            else -> throw Exception("unexpected type")
+            else -> throw IllegalStateException("unexpected type")
         }
         cursor.close()
         return result
@@ -80,7 +80,7 @@ internal class Database private constructor(context: Context) : SQLiteOpenHelper
     }
 
     override fun onUpgrade(sqLiteDatabase: SQLiteDatabase, i: Int, i1: Int) {
-
+        // no-op
     }
 
     internal inner class Entry internal constructor(val timestamp: Long, val steps: Int)