diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt b/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt
index 9823d7b9a..14e84e588 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt
@@ -54,8 +54,8 @@ class Book(
   @JoinColumn(name = "media_id", nullable = false)
   var media: Media = Media()
 
-  @Column(name = "number", nullable = false, columnDefinition = "REAL")
-  var number: Float = 0F
+  @Column(name = "number", nullable = false)
+  var number: Int = 0
 
   fun fileName(): String = FilenameUtils.getName(url.toString())
 
diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/model/Series.kt b/komga/src/main/kotlin/org/gotson/komga/domain/model/Series.kt
index dba878a8b..002e298c6 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/model/Series.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/model/Series.kt
@@ -61,7 +61,7 @@ class Series(
       _books.clear()
       value.forEach { it.series = this }
       _books.addAll(value.sortedWith(compareBy(natSortComparator) { it.name }))
-      _books.forEachIndexed { index, book -> book.number = index + 1F }
+      _books.forEachIndexed { index, book -> book.number = index + 1 }
     }
 
   @OneToOne(optional = false, orphanRemoval = true, cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/rest/dto/BookDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/rest/dto/BookDto.kt
index 2f91d9f59..86b6c7fb7 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/rest/dto/BookDto.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/rest/dto/BookDto.kt
@@ -10,7 +10,7 @@ data class BookDto(
   val seriesId: Long,
   val name: String,
   val url: String,
-  val number: Float,
+  val number: Int,
   @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss")
   val created: LocalDateTime?,
   @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss")
diff --git a/komga/src/main/resources/db/migration/V20200306174948__book_number_to_int.sql b/komga/src/main/resources/db/migration/V20200306174948__book_number_to_int.sql
new file mode 100644
index 000000000..230cbb2af
--- /dev/null
+++ b/komga/src/main/resources/db/migration/V20200306174948__book_number_to_int.sql
@@ -0,0 +1,2 @@
+alter table book
+    alter column number set data type int;