diff --git a/app/src/main/java/eu/kanade/tachiyomi/source/online/all/EHentai.kt b/app/src/main/java/eu/kanade/tachiyomi/source/online/all/EHentai.kt
index f8250d07f..a895799d8 100755
--- a/app/src/main/java/eu/kanade/tachiyomi/source/online/all/EHentai.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/source/online/all/EHentai.kt
@@ -284,7 +284,7 @@ class EHentai(
 
     override suspend fun getChapterList(manga: MangaInfo): List<ChapterInfo> = getChapterList(manga) {}
 
-    suspend fun getChapterList(manga: MangaInfo, throttleFunc: () -> Unit): List<ChapterInfo> {
+    suspend fun getChapterList(manga: MangaInfo, throttleFunc: suspend () -> Unit): List<ChapterInfo> {
         // Pull all the way to the root gallery
         // We can't do this with RxJava or we run into stack overflows on shit like this:
         //   https://exhentai.org/g/1073061/f9345f1c12/
@@ -357,7 +357,7 @@ class EHentai(
 
     @Suppress("DeprecatedCallableAddReplaceWith")
     @Deprecated("Use getChapterList instead")
-    fun fetchChapterList(manga: SManga, throttleFunc: () -> Unit) = runAsObservable({
+    fun fetchChapterList(manga: SManga, throttleFunc: suspend () -> Unit) = runAsObservable({
         getChapterList(manga.toMangaInfo(), throttleFunc).map { it.toSChapter() }
     })
 
diff --git a/app/src/main/java/exh/GalleryAdder.kt b/app/src/main/java/exh/GalleryAdder.kt
index b5ce947ea..c71544736 100755
--- a/app/src/main/java/exh/GalleryAdder.kt
+++ b/app/src/main/java/exh/GalleryAdder.kt
@@ -53,7 +53,7 @@ class GalleryAdder {
         url: String,
         fav: Boolean = false,
         forceSource: UrlImportableSource? = null,
-        throttleFunc: () -> Unit = {}
+        throttleFunc: suspend () -> Unit = {}
     ): GalleryAddEvent {
         logger.d(context.getString(R.string.gallery_adder_importing_manga, url, fav.toString(), forceSource))
         try {
diff --git a/app/src/main/java/exh/eh/EHentaiThrottleManager.kt b/app/src/main/java/exh/eh/EHentaiThrottleManager.kt
index 278fa62eb..2661cf614 100644
--- a/app/src/main/java/exh/eh/EHentaiThrottleManager.kt
+++ b/app/src/main/java/exh/eh/EHentaiThrottleManager.kt
@@ -1,5 +1,7 @@
 package exh.eh
 
+import kotlinx.coroutines.delay
+
 class EHentaiThrottleManager(
     private val max: Int = THROTTLE_MAX,
     private val inc: Int = THROTTLE_INC
@@ -8,12 +10,12 @@ class EHentaiThrottleManager(
     var throttleTime: Long = 0
         private set
 
-    fun throttle() {
+    suspend fun throttle() {
         // Throttle requests if necessary
         val now = System.currentTimeMillis()
         val timeDiff = now - lastThrottleTime
         if (timeDiff < throttleTime) {
-            Thread.sleep(throttleTime - timeDiff)
+            delay(throttleTime - timeDiff)
         }
 
         if (throttleTime < max) {