diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/service/BookLifecycle.kt b/komga/src/main/kotlin/org/gotson/komga/domain/service/BookLifecycle.kt
index 974c779af9..fb42c9b084 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/service/BookLifecycle.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/service/BookLifecycle.kt
@@ -459,15 +459,18 @@ class BookLifecycle(
           // match progression with positions
           val matchingPositions = extension.positions.filter { it.href == href }
           val matchedPosition =
-            matchingPositions.firstOrNull { it.locations!!.progression == newProgression.locator.locations!!.progression }
-              ?: run {
-                // no exact match
-                val before = matchingPositions.filter { it.locations!!.progression!! < newProgression.locator.locations!!.progression!! }.maxByOrNull { it.locations!!.position!! }
-                val after = matchingPositions.filter { it.locations!!.progression!! > newProgression.locator.locations!!.progression!! }.minByOrNull { it.locations!!.position!! }
-                if (before == null || after == null || before.locations!!.position!! > after.locations!!.position!!)
-                  throw IllegalArgumentException("Invalid progression")
-                before
-              }
+            if (extension.isFixedLayout && matchingPositions.size == 1)
+              matchingPositions.first()
+            else
+              matchingPositions.firstOrNull { it.locations!!.progression == newProgression.locator.locations!!.progression }
+                ?: run {
+                  // no exact match
+                  val before = matchingPositions.filter { it.locations!!.progression!! < newProgression.locator.locations!!.progression!! }.maxByOrNull { it.locations!!.position!! }
+                  val after = matchingPositions.filter { it.locations!!.progression!! > newProgression.locator.locations!!.progression!! }.minByOrNull { it.locations!!.position!! }
+                  if (before == null || after == null || before.locations!!.position!! > after.locations!!.position!!)
+                    throw IllegalArgumentException("Invalid progression")
+                  before
+                }
 
           val totalProgression = matchedPosition.locations?.totalProgression
           ReadProgress(
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/KoboController.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/KoboController.kt
index 1287cf85f6..62627e7bb4 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/KoboController.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/KoboController.kt
@@ -35,6 +35,7 @@ import org.gotson.komga.interfaces.api.kobo.dto.ChangedEntitlementDto
 import org.gotson.komga.interfaces.api.kobo.dto.KoboBookMetadataDto
 import org.gotson.komga.interfaces.api.kobo.dto.NewEntitlementDto
 import org.gotson.komga.interfaces.api.kobo.dto.ReadingStateDto
+import org.gotson.komga.interfaces.api.kobo.dto.ReadingStateStateUpdateDto
 import org.gotson.komga.interfaces.api.kobo.dto.ReadingStateUpdateResultDto
 import org.gotson.komga.interfaces.api.kobo.dto.RequestResultDto
 import org.gotson.komga.interfaces.api.kobo.dto.ResourcesDto
@@ -382,17 +383,18 @@ class KoboController(
   fun updateState(
     @AuthenticationPrincipal principal: KomgaPrincipal,
     @PathVariable bookId: String,
-    @RequestBody koboUpdate: ReadingStateDto,
+    @RequestBody body: ReadingStateStateUpdateDto,
     @RequestHeader(name = X_KOBO_DEVICEID, required = false) koboDeviceId: String = "unknown",
   ): ResponseEntity<*> {
     val book =
       bookRepository.findByIdOrNull(bookId)
         ?: if (koboProxy.isEnabled())
-          return koboProxy.proxyCurrentRequest(koboUpdate)
+          return koboProxy.proxyCurrentRequest(body)
         else
           throw ResponseStatusException(HttpStatus.NOT_FOUND)
 
-    if (koboUpdate.currentBookmark.location == null) throw ResponseStatusException(HttpStatus.BAD_REQUEST)
+    val koboUpdate = body.readingStates.firstOrNull() ?: throw ResponseStatusException(HttpStatus.BAD_REQUEST)
+    if (koboUpdate.currentBookmark.location == null || koboUpdate.currentBookmark.contentSourceProgressPercent == null) throw ResponseStatusException(HttpStatus.BAD_REQUEST)
 
     // convert the Kobo update request to an R2Progression
     val r2Progression =
@@ -411,7 +413,7 @@ class KoboController(
             type = "application/xhtml+xml",
             locations =
               R2Locator.Location(
-                progression = koboUpdate.currentBookmark.progressPercent,
+                progression = koboUpdate.currentBookmark.contentSourceProgressPercent / 100,
               ),
           ),
       )
@@ -433,6 +435,7 @@ class KoboController(
             ),
         )
       } catch (e: Exception) {
+        logger.error(e) { "Could not update progression" }
         RequestResultDto(
           requestResult = ResultDto.FAILURE,
           updateResults =
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/ReadingStateDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/ReadingStateDto.kt
index f2f0dd5c2d..29bd507425 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/ReadingStateDto.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/ReadingStateDto.kt
@@ -8,14 +8,14 @@ import java.time.ZonedDateTime
 
 @JsonNaming(PropertyNamingStrategies.UpperCamelCaseStrategy::class)
 data class ReadingStateDto(
-  val created: ZonedDateTime,
+  val created: ZonedDateTime? = null,
   val currentBookmark: BookmarkDto,
   val entitlementId: String,
   val lastModified: ZonedDateTime,
   /**
    * From CW: apparently always equals to lastModified
    */
-  val priorityTimestamp: ZonedDateTime,
+  val priorityTimestamp: ZonedDateTime? = null,
   val statistics: StatisticsDto,
   val statusInfo: StatusInfoDto,
 )
@@ -29,8 +29,8 @@ fun ReadProgress.toDto() =
     currentBookmark =
       BookmarkDto(
         lastModified = this.lastModifiedDate.toUTCZoned(),
-        progressPercent = this.locator?.locations?.totalProgression,
-        contentSourceProgressPercent = this.locator?.locations?.progression,
+        progressPercent = this.locator?.locations?.totalProgression?.times(100),
+        contentSourceProgressPercent = this.locator?.locations?.progression?.times(100),
         location = this.locator?.let { LocationDto(source = it.href) },
       ),
     statistics =
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/ReadingStateStateUpdateDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/ReadingStateStateUpdateDto.kt
new file mode 100644
index 0000000000..dd9150e78f
--- /dev/null
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/ReadingStateStateUpdateDto.kt
@@ -0,0 +1,9 @@
+package org.gotson.komga.interfaces.api.kobo.dto
+
+import com.fasterxml.jackson.databind.PropertyNamingStrategies
+import com.fasterxml.jackson.databind.annotation.JsonNaming
+
+@JsonNaming(PropertyNamingStrategies.UpperCamelCaseStrategy::class)
+data class ReadingStateStateUpdateDto(
+  val readingStates: Collection<ReadingStateDto> = emptyList(),
+)
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusDto.kt
index 89025b132e..dabedde8c5 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusDto.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusDto.kt
@@ -8,6 +8,10 @@ import com.fasterxml.jackson.databind.annotation.JsonNaming
 enum class StatusDto {
   @JsonProperty("ReadyToRead")
   READY_TO_READ,
+
+  @JsonProperty("Finished")
   FINISHED,
+
+  @JsonProperty("Reading")
   READING,
 }
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusInfoDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusInfoDto.kt
index c8d8732f02..1a784555ab 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusInfoDto.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/dto/StatusInfoDto.kt
@@ -10,7 +10,7 @@ import java.time.ZonedDateTime
 data class StatusInfoDto(
   val lastModified: ZonedDateTime,
   val status: StatusDto,
-  val timesStartedReading: Int,
+  val timesStartedReading: Int? = null,
   val lastTimeFinished: ZonedDateTime? = null,
   val lastTimeStartedReading: ZonedDateTime? = null,
 )