diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/HeanCms.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/HeanCms.kt
index c55a3389..302c61e1 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/HeanCms.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/HeanCms.kt
@@ -143,9 +143,13 @@ internal abstract class HeanCms(
 
 	protected open val datePattern = "yyyy-MM-dd"
 
+	protected open fun reqUrl(seriesId: Long): String {
+		return "https://$apiPath/chapter/query?page=1&perPage=9999&series_id=$seriesId"
+	}
+
 	override suspend fun getDetails(manga: Manga): Manga {
 		val seriesId = manga.url.toLongOrNull() ?: manga.id // backward compatibility
-		val url = "https://$apiPath/chapter/query?page=1&perPage=9999&series_id=$seriesId"
+		val url = reqUrl(seriesId) // keep old API url, can replace it
 		val response = webClient.httpGet(url).parseJson()
 		val data = response.getJSONArray("data").asTypedList<JSONObject>()
 		val dateFormat = SimpleDateFormat(datePattern, Locale.ENGLISH)
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/en/ReaperComics.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/en/ReaperComics.kt
index 5cec88c4..e4b8cf57 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/en/ReaperComics.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/heancms/en/ReaperComics.kt
@@ -11,4 +11,8 @@ internal class ReaperComics(context: MangaLoaderContext) :
 	override val cdn = "media.reaperscans.com/file/4SRBHm//"
 	override val paramsUpdated = "updated_at"
 	override val selectPages = ".flex > img"
-}
+
+	override fun reqUrl(seriesId: Long): String {
+		return "https://$apiPath/chapters/$seriesId?page=1&perPage=9999&order=desc"
+	}
+}
\ No newline at end of file