diff --git a/.idea/assetWizardSettings.xml b/.idea/assetWizardSettings.xml
index 5541fbfc..d2dc8a13 100644
--- a/.idea/assetWizardSettings.xml
+++ b/.idea/assetWizardSettings.xml
@@ -18,7 +18,7 @@
                                 <PersistentState>
                                   <option name="values">
                                     <map>
-                                      <entry key="url" value="jar:file:/C:/Program%20Files/Android/Android%20Studio1/plugins/android/lib/android.jar!/images/material/icons/materialicons/delete_outline/baseline_delete_outline_24.xml" />
+                                      <entry key="url" value="file:/$PROJECT_DIR$/../../../../../tools/android-sdk/icons/material/materialiconsoutlined/check/outline_check_24.xml" />
                                     </map>
                                   </option>
                                 </PersistentState>
@@ -29,7 +29,7 @@
                         <option name="values">
                           <map>
                             <entry key="color" value="ffffff" />
-                            <entry key="outputName" value="ic_baseline_delete_outline_24" />
+                            <entry key="outputName" value="ic_outline_check_24" />
                             <entry key="sourceFile" value="C:\Users\Tine" />
                           </map>
                         </option>
diff --git a/app/src/main/java/de/christinecoenen/code/zapp/app/mediathek/controller/downloads/DownloadWorker.kt b/app/src/main/java/de/christinecoenen/code/zapp/app/mediathek/controller/downloads/DownloadWorker.kt
index f9f19639..eff40800 100644
--- a/app/src/main/java/de/christinecoenen/code/zapp/app/mediathek/controller/downloads/DownloadWorker.kt
+++ b/app/src/main/java/de/christinecoenen/code/zapp/app/mediathek/controller/downloads/DownloadWorker.kt
@@ -71,11 +71,11 @@ class DownloadWorker(appContext: Context, workerParams: WorkerParameters) :
 		appContext, title, persistedShowId, getCancelIntent(),
 	)
 
-	override suspend fun doWork(): Result {
+	override suspend fun doWork(): Result = withContext(Dispatchers.IO) {
 		reportProgress()
 
 		if (sourceUrl == null || targetFileUri == null || persistedShowId == -1) {
-			return failure()
+			return@withContext failure()
 		}
 
 		val request = Request.Builder().url(sourceUrl!!).build()
@@ -83,7 +83,7 @@ class DownloadWorker(appContext: Context, workerParams: WorkerParameters) :
 
 		if (!response.isSuccessful || response.body() == null) {
 			Timber.w("server response not successful")
-			return failure()
+			return@withContext failure()
 		}
 
 		val body = response.body()!!
@@ -91,7 +91,7 @@ class DownloadWorker(appContext: Context, workerParams: WorkerParameters) :
 			downloadFileInfoManager.openOutputStream(targetFileUri!!).use { outputSream ->
 				if (outputSream == null) {
 					Timber.w("fileoutputstream not readable")
-					return failure()
+					return@use failure()
 				}
 
 				body.byteStream().use { inputStream ->
@@ -100,16 +100,16 @@ class DownloadWorker(appContext: Context, workerParams: WorkerParameters) :
 			}
 		} catch (e: CancellationException) {
 			// cancelled - no not show any notification
-			return Result.failure()
+			return@withContext Result.failure()
 		} catch (e: Exception) {
 			Timber.w(e)
-			return failure()
+			return@withContext failure()
 		}
 
 		progress = 100
 		reportProgress()
 
-		return success()
+		return@withContext success()
 	}
 
 	private fun success(): Result {