diff --git a/app/src/main/kotlin/at/bitfire/davdroid/servicedetection/RefreshCollectionsWorker.kt b/app/src/main/kotlin/at/bitfire/davdroid/servicedetection/RefreshCollectionsWorker.kt
index 8efd63168117130b56c14f93fc6424736b8e26a4..45aea5d2fc99baaa86e203f59e70b0f9f2405204 100644
--- a/app/src/main/kotlin/at/bitfire/davdroid/servicedetection/RefreshCollectionsWorker.kt
+++ b/app/src/main/kotlin/at/bitfire/davdroid/servicedetection/RefreshCollectionsWorker.kt
@@ -13,9 +13,11 @@ import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.hilt.work.HiltWorker
 import androidx.lifecycle.map
+import androidx.work.Constraints
 import androidx.work.Data
 import androidx.work.ExistingWorkPolicy
 import androidx.work.ForegroundInfo
+import androidx.work.NetworkType
 import androidx.work.OneTimeWorkRequestBuilder
 import androidx.work.OutOfQuotaPolicy
 import androidx.work.WorkInfo
@@ -139,9 +141,15 @@ class RefreshCollectionsWorker @AssistedInject constructor(
             val arguments = Data.Builder()
                 .putLong(ARG_SERVICE_ID, serviceId)
                 .build()
+
+            val constraints = Constraints.Builder()
+                .setRequiredNetworkType(NetworkType.CONNECTED)
+                .build()
+
             val workRequest = OneTimeWorkRequestBuilder<RefreshCollectionsWorker>()
                 .setInputData(arguments)
                 .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+                .setConstraints(constraints)
                 .build()
 
             WorkManager.getInstance(context).enqueueUniqueWork(