diff --git a/app/build.gradle b/app/build.gradle
index 45e8197a4..02ddc2b3b 100755
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -281,7 +281,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
 
-    final coroutines_version = '1.3.5'
+    final coroutines_version = '1.3.7'
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-reactive:$coroutines_version"
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaAllInOnePresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaAllInOnePresenter.kt
index da88804cb..5308b8e4c 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaAllInOnePresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaAllInOnePresenter.kt
@@ -161,7 +161,7 @@ class MangaAllInOnePresenter(
         scope.launch(Dispatchers.IO) {
             var manga2: Manga? = null
             if (updateInfo) {
-                manga2 = db.getManga(manga.url, manga.source).executeAsBlocking()!!
+                manga2 = db.getManga(manga.url, manga.source).executeAsBlocking()
                 updateChapters()
                 updateChapterInfo()
             }
@@ -190,7 +190,7 @@ class MangaAllInOnePresenter(
                 val networkManga = try {
                     source.fetchMangaDetails(manga).toBlocking().single()
                 } catch (e: Exception) {
-                    withContext(Dispatchers.Main) { controller.onFetchMangaError(e) }
+                    controller.onFetchMangaError(e)
                     return@launch
                 }
                 if (networkManga != null) {
@@ -205,7 +205,7 @@ class MangaAllInOnePresenter(
                 try {
                     chapters = source.fetchChapterList(manga).toBlocking().single()
                 } catch (e: Exception) {
-                    withContext(Dispatchers.Main) { controller.onFetchMangaError(e) }
+                    controller.onFetchMangaError(e)
                     return@launch
                 }
             }
@@ -220,10 +220,8 @@ class MangaAllInOnePresenter(
                     updateManga(updateInfo = false)
                     controller.onFetchMangaDone()
                 }
-            } catch (e: java.lang.Exception) {
-                withContext(Dispatchers.Main) {
-                    controller.onFetchMangaError(e)
-                }
+            } catch (e: Exception) {
+                controller.onFetchMangaError(e)
             }
         }
     }