diff --git a/app/build.gradle b/app/build.gradle
index 0e4dbd07..63612923 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -16,8 +16,8 @@ android {
         testApplicationId "io.github.tests.wulkanowy"
         minSdkVersion 15
         targetSdkVersion 28
-        versionCode 28
-        versionName "0.7.2"
+        versionCode 29
+        versionName "0.7.3"
         multiDexEnabled true
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
diff --git a/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt b/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
index 68fc7c64..e427647f 100644
--- a/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
+++ b/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
@@ -19,7 +19,11 @@ import io.github.wulkanowy.di.DaggerAppComponent
 import io.github.wulkanowy.services.sync.SyncWorkerFactory
 import io.github.wulkanowy.utils.CrashlyticsTree
 import io.github.wulkanowy.utils.DebugLogTree
+import io.reactivex.exceptions.UndeliverableException
+import io.reactivex.plugins.RxJavaPlugins
 import timber.log.Timber
+import java.io.IOException
+import java.lang.Exception
 import javax.inject.Inject
 
 class WulkanowyApp : DaggerApplication() {
@@ -42,6 +46,7 @@ class WulkanowyApp : DaggerApplication() {
         if (DEBUG) enableDebugLog()
         AppCompatDelegate.setDefaultNightMode(prefRepository.currentTheme)
         WorkManager.initialize(this, Configuration.Builder().setWorkerFactory(workerFactory).build())
+        RxJavaPlugins.setErrorHandler(::onError)
     }
 
     private fun enableDebugLog() {
@@ -56,6 +61,12 @@ class WulkanowyApp : DaggerApplication() {
         Timber.plant(CrashlyticsTree())
     }
 
+    private fun onError(t: Throwable) {
+        if (t is UndeliverableException && t.cause is IOException || t.cause is InterruptedException) {
+            Timber.e(t.cause, "An undeliverable error occurred")
+        } else throw t
+    }
+
     override fun applicationInjector(): AndroidInjector<out DaggerApplication> {
         return DaggerAppComponent.builder().create(this)
     }
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt b/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt
index 36593966..134fb034 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt
@@ -19,7 +19,6 @@ import io.github.wulkanowy.services.sync.channels.DebugChannel
 import io.github.wulkanowy.services.sync.works.Work
 import io.github.wulkanowy.utils.getCompatColor
 import io.reactivex.Completable
-import io.reactivex.Flowable
 import io.reactivex.Single
 import timber.log.Timber
 import kotlin.random.Random
@@ -42,12 +41,12 @@ class SyncWorker @AssistedInject constructor(
             .flatMapCompletable { student ->
                 semesterRepository.getCurrentSemester(student, true)
                     .flatMapCompletable { semester ->
-                        Completable.mergeDelayError(Flowable.fromIterable(works.map { work ->
+                        Completable.mergeDelayError(works.map { work ->
                             work.create(student, semester)
                                 .doOnSubscribe { Timber.i("${work::class.java.simpleName} is starting") }
                                 .doOnError { Timber.i("${work::class.java.simpleName} result: An exception occurred") }
                                 .doOnComplete { Timber.i("${work::class.java.simpleName} result: Success") }
-                        }), 3)
+                        })
                     }
             }
             .toSingleDefault(Result.success())
diff --git a/app/src/main/play/release-notes/pl-PL/default.txt b/app/src/main/play/release-notes/pl-PL/default.txt
index bdf045f5..6cf59d4b 100644
--- a/app/src/main/play/release-notes/pl-PL/default.txt
+++ b/app/src/main/play/release-notes/pl-PL/default.txt
@@ -1,6 +1,6 @@
-Naprawiliśmy:
-- problemy ze stabilnością podczas przełączania zakładek
-- nierówność w nawigacji między dniami w planie lekcji i frekwencji
-- zły wygląd odświeżania w szczęśliwym numerku
+Wersja 0.7.3
 
-Pełna lista zmian: https://github.com/wulkanowy/wulkanowy/releases/tag/0.7.2
+Naprawiliśmy:
+- naprawiono problemy ze stabilnością podczas odświeżania danych
+
+Pełna lista zmian: https://github.com/wulkanowy/wulkanowy/releases/tag/0.7.3