diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaApi.kt b/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaApi.kt
index d59efdec3e..d242345999 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaApi.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaApi.kt
@@ -38,9 +38,11 @@ class KomgaApi(private val client: OkHttpClient) {
                 }
 
                 val progress = client
-                    .newCall(GET("$url/read-progress/tachiyomi"))
-                    .await()
-                    .parseAs<ReadProgressDto>()
+                    .newCall(GET("${url.replace("/api/v1/series/", "/api/v2/series/")}/read-progress/tachiyomi"))
+                    .await().let {
+                        if (url.contains("/api/v1/series/")) it.parseAs<ReadProgressV2Dto>()
+                        else it.parseAs<ReadProgressDto>().toV2()
+                    }
 
                 track.apply {
                     cover_url = "$url/thumbnail"
@@ -51,7 +53,7 @@ class KomgaApi(private val client: OkHttpClient) {
                         progress.booksReadCount -> Komga.COMPLETED
                         else -> Komga.READING
                     }
-                    last_chapter_read = progress.lastReadContinuousIndex.toFloat()
+                    last_chapter_read = progress.lastReadContinuousNumberSort
                 }
             } catch (e: Exception) {
                 Timber.w(e, "Could not get item: $url")
@@ -60,11 +62,14 @@ class KomgaApi(private val client: OkHttpClient) {
         }
 
     suspend fun updateProgress(track: Track): Track {
-        val progress = ReadProgressUpdateDto(track.last_chapter_read.toInt())
-        val payload = json.encodeToString(progress)
+        val payload = if (track.tracking_url.contains("/api/v1/series/")) {
+            json.encodeToString(ReadProgressUpdateV2Dto(track.last_chapter_read))
+        } else {
+            json.encodeToString(ReadProgressUpdateDto(track.last_chapter_read.toInt()))
+        }
         client.newCall(
             Request.Builder()
-                .url("${track.tracking_url}/read-progress/tachiyomi")
+                .url("${track.tracking_url.replace("/api/v1/series/", "/api/v2/series/")}/read-progress/tachiyomi")
                 .put(payload.toRequestBody("application/json".toMediaType()))
                 .build()
         )
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaModels.kt b/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaModels.kt
index d27af7f16d..2618adf8b0 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaModels.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/KomgaModels.kt
@@ -63,6 +63,11 @@ data class ReadProgressUpdateDto(
     val lastBookRead: Int,
 )
 
+@Serializable
+data class ReadProgressUpdateV2Dto(
+    val lastBookNumberSortRead: Float,
+)
+
 @Serializable
 data class ReadListDto(
     val id: String,
@@ -80,4 +85,21 @@ data class ReadProgressDto(
     val booksUnreadCount: Int,
     val booksInProgressCount: Int,
     val lastReadContinuousIndex: Int,
+) {
+    fun toV2() = ReadProgressV2Dto(
+        booksCount,
+        booksReadCount,
+        booksUnreadCount,
+        booksInProgressCount,
+        lastReadContinuousIndex.toFloat()
+    )
+}
+
+@Serializable
+data class ReadProgressV2Dto(
+    val booksCount: Int,
+    val booksReadCount: Int,
+    val booksUnreadCount: Int,
+    val booksInProgressCount: Int,
+    val lastReadContinuousNumberSort: Float,
 )
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterTrackSync.kt b/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterTrackSync.kt
index 192ce0711d..34af53388e 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterTrackSync.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/chapter/ChapterTrackSync.kt
@@ -18,22 +18,15 @@ import timber.log.Timber
 fun syncChaptersWithTrackServiceTwoWay(db: DatabaseHelper, chapters: List<Chapter>, remoteTrack: Track, service: TrackService) {
     val sortedChapters = chapters.sortedBy { it.chapter_number }
     sortedChapters
-        .filterIndexed { index, chapter -> index < remoteTrack.last_chapter_read && !chapter.read }
+        .filter { chapter -> chapter.chapter_number <= remoteTrack.last_chapter_read && !chapter.read }
         .forEach { it.read = true }
     db.updateChaptersProgress(sortedChapters).executeAsBlocking()
 
-    // this uses the ordinal index of chapters instead of the chapter_number
-    // it was done that way because Track.last_chapter_read was an Int at the time, and Komga
-    // could have Float for the chapter number
-    // this will be addressed later on
-    val localLastRead = when {
-        sortedChapters.all { it.read } -> sortedChapters.size
-        sortedChapters.any { !it.read } -> sortedChapters.indexOfFirst { !it.read }
-        else -> 0
-    }
+    // only take into account continuous reading
+    val localLastRead = sortedChapters.takeWhile { it.read }.lastOrNull()?.chapter_number ?: 0F
 
     // update remote
-    remoteTrack.last_chapter_read = localLastRead.toFloat()
+    remoteTrack.last_chapter_read = localLastRead
 
     launchIO {
         try {