diff --git a/app/src/main/java/org/koitharu/kotatsu/core/db/DatabaseModule.kt b/app/src/main/java/org/koitharu/kotatsu/core/db/DatabaseModule.kt
index 18e206142..150dba8dd 100644
--- a/app/src/main/java/org/koitharu/kotatsu/core/db/DatabaseModule.kt
+++ b/app/src/main/java/org/koitharu/kotatsu/core/db/DatabaseModule.kt
@@ -1,16 +1,9 @@
 package org.koitharu.kotatsu.core.db
 
-import androidx.room.InvalidationTracker
 import org.koin.android.ext.koin.androidContext
 import org.koin.dsl.module
 
 val databaseModule
 	get() = module {
-		single {
-			MangaDatabase(androidContext()).also { db ->
-				getAll<InvalidationTracker.Observer>().forEach {
-					db.invalidationTracker.addObserver(it)
-				}
-			}
-		}
-	}
\ No newline at end of file
+		single { MangaDatabase(androidContext()) }
+	}
diff --git a/app/src/main/java/org/koitharu/kotatsu/sync/domain/SyncController.kt b/app/src/main/java/org/koitharu/kotatsu/sync/domain/SyncController.kt
index 00c7d2b22..2924b8480 100644
--- a/app/src/main/java/org/koitharu/kotatsu/sync/domain/SyncController.kt
+++ b/app/src/main/java/org/koitharu/kotatsu/sync/domain/SyncController.kt
@@ -34,7 +34,7 @@ class SyncController(
 	private val mutex = Mutex()
 	private val jobs = ArrayMap<String, Job>(2)
 	private val defaultGcPeriod: Long // gc period if sync disabled
-		get() = TimeUnit.DAYS.toMillis(2)
+		get() = TimeUnit.HOURS.toMillis(2)
 
 	override fun onInvalidated(tables: MutableSet<String>) {
 		requestSync(
@@ -136,4 +136,4 @@ class SyncController(
 			favouriteCategoriesDao.gc(deletedAt)
 		}
 	}
-}
\ No newline at end of file
+}