diff --git a/komga/src/main/kotlin/org/gotson/komga/infrastructure/metadata/epub/EpubMetadataProvider.kt b/komga/src/main/kotlin/org/gotson/komga/infrastructure/metadata/epub/EpubMetadataProvider.kt
index a56575de4..138e7a588 100644
--- a/komga/src/main/kotlin/org/gotson/komga/infrastructure/metadata/epub/EpubMetadataProvider.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/infrastructure/metadata/epub/EpubMetadataProvider.kt
@@ -65,7 +65,8 @@ class EpubMetadataProvider(
         }
 
       val isbn = opf.select("metadata > dc|identifier")
-        ?.mapNotNull { isbnValidator.validate(it.text()) }
+        ?.map { it.text().removePrefix("isbn:") }
+        ?.mapNotNull { isbnValidator.validate(it) }
         ?.firstOrNull()
 
       return BookMetadataPatch(