diff --git a/src/vi/nettruyenco/build.gradle b/src/vi/nettruyenco/build.gradle
index 0b5e89768..aaf36db3c 100644
--- a/src/vi/nettruyenco/build.gradle
+++ b/src/vi/nettruyenco/build.gradle
@@ -3,7 +3,7 @@ ext {
     extClass = '.NetTruyenCO'
     themePkg = 'wpcomics'
     baseUrl = 'https://nettruyenrr.com'
-    overrideVersionCode = 6
+    overrideVersionCode = 7
     isNsfw = false
 }
 
diff --git a/src/vi/nettruyenco/src/eu/kanade/tachiyomi/extension/vi/nettruyenco/NetTruyenCO.kt b/src/vi/nettruyenco/src/eu/kanade/tachiyomi/extension/vi/nettruyenco/NetTruyenCO.kt
index 01d888e80..46170d328 100644
--- a/src/vi/nettruyenco/src/eu/kanade/tachiyomi/extension/vi/nettruyenco/NetTruyenCO.kt
+++ b/src/vi/nettruyenco/src/eu/kanade/tachiyomi/extension/vi/nettruyenco/NetTruyenCO.kt
@@ -45,13 +45,13 @@ class NetTruyenCO : WPComics(
     // Build and return the request to fetch all chapters in JSON form
     override fun chapterListRequest(manga: SManga): Request {
         val slugAndId = manga.url.substringAfterLast("/") // e.g. "slug-12345"
-        val comicId = slugAndId.substringAfterLast("-").toInt() // 12345
+        val comicId = slugAndId.substringAfterLast("-") // 12345
         val slug = slugAndId.substringBeforeLast("-") // "slug"
         val url = baseUrl.toHttpUrl()
             .newBuilder()
             .addPathSegments("Comic/Services/ComicService.asmx/ChapterList")
             .addQueryParameter("slug", slug)
-            .addQueryParameter("comicId", comicId.toString())
+            .addQueryParameter("comicId", comicId)
             .build()
         return GET(url, headers)
     }