diff --git a/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGenerator.kt b/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGenerator.kt
index b76e5389b..37628a475 100644
--- a/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGenerator.kt
+++ b/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGenerator.kt
@@ -9,7 +9,7 @@ class LibGenerator : ThemeSourceGenerator {
 
     override val themeClass = "LibGroup"
 
-    override val baseVersionCode: Int = 21
+    override val baseVersionCode: Int = 22
 
     override val sources = listOf(
         SingleLang("MangaLib", "https://mangalib.me", "ru", overrideVersionCode = 74),
diff --git a/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGroup.kt b/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGroup.kt
index 558d7a45d..3a316b15f 100644
--- a/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGroup.kt
+++ b/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/libgroup/LibGroup.kt
@@ -410,7 +410,7 @@ abstract class LibGroup(
         chapter.scanlator = if (teams?.size == 1) teams[0].jsonObject["name"]?.jsonPrimitive?.content else if (isScanlatorId.orEmpty().isNotEmpty()) isScanlatorId!![0].jsonObject["name"]?.jsonPrimitive?.content else branches?.let { getScanlatorTeamName(it, chapterItem) } ?: if ((preferences.getBoolean(isScan_USER, false)) || (chaptersList?.distinctBy { it.jsonObject["username"]!!.jsonPrimitive.content }?.size == 1)) chapterItem.jsonObject["username"]!!.jsonPrimitive.content else null
         chapter.name = if (nameChapter.isNullOrBlank()) fullNameChapter else "$fullNameChapter - $nameChapter"
         chapter.date_upload = simpleDateFormat.parse(chapterItem.jsonObject["chapter_created_at"]!!.jsonPrimitive.content.substringBefore(" "))?.time ?: 0L
-        chapter.chapter_number = number.toFloat()
+        chapter.chapter_number = number.toFloatOrNull() ?: -1f
 
         return chapter
     }