diff --git a/api-reports/2_12.txt b/api-reports/2_12.txt
index 3f4f8df0b..fe4fab736 100644
--- a/api-reports/2_12.txt
+++ b/api-reports/2_12.txt
@@ -15219,7 +15219,7 @@ raw/IDBVersionChangeEvent[JC] def currentTarget: EventTarget
 raw/IDBVersionChangeEvent[JC] def defaultPrevented: Boolean
 raw/IDBVersionChangeEvent[JC] def eventPhase: Int
 raw/IDBVersionChangeEvent[JC] def isTrusted: Boolean
-raw/IDBVersionChangeEvent[JC] def newVersion: Int
+raw/IDBVersionChangeEvent[JC] def newVersion: Integer
 raw/IDBVersionChangeEvent[JC] def oldVersion: Int
 raw/IDBVersionChangeEvent[JC] def preventDefault(): Unit
 raw/IDBVersionChangeEvent[JC] def stopImmediatePropagation(): Unit
@@ -15230,7 +15230,7 @@ raw/IDBVersionChangeEvent[JC] def `type`: String
 raw/IDBVersionChangeEventInit[JT] var bubbles: js.UndefOr[Boolean]
 raw/IDBVersionChangeEventInit[JT] var cancelable: js.UndefOr[Boolean]
 raw/IDBVersionChangeEventInit[JT] var composed: js.UndefOr[Boolean]
-raw/IDBVersionChangeEventInit[JT] var newVersion: js.UndefOr[Int]
+raw/IDBVersionChangeEventInit[JT] var newVersion: js.UndefOr[Integer]
 raw/IDBVersionChangeEventInit[JT] var oldVersion: js.UndefOr[Int]
 raw/IDBVersionChangeEventInit[JT] var scoped: js.UndefOr[Boolean]
 raw/ImageData[JC] def data: js.Array[Int]
diff --git a/api-reports/2_13.txt b/api-reports/2_13.txt
index f726af3aa..513f4d29b 100644
--- a/api-reports/2_13.txt
+++ b/api-reports/2_13.txt
@@ -15219,7 +15219,7 @@ raw/IDBVersionChangeEvent[JC] def currentTarget: EventTarget
 raw/IDBVersionChangeEvent[JC] def defaultPrevented: Boolean
 raw/IDBVersionChangeEvent[JC] def eventPhase: Int
 raw/IDBVersionChangeEvent[JC] def isTrusted: Boolean
-raw/IDBVersionChangeEvent[JC] def newVersion: Int
+raw/IDBVersionChangeEvent[JC] def newVersion: Integer
 raw/IDBVersionChangeEvent[JC] def oldVersion: Int
 raw/IDBVersionChangeEvent[JC] def preventDefault(): Unit
 raw/IDBVersionChangeEvent[JC] def stopImmediatePropagation(): Unit
@@ -15230,7 +15230,7 @@ raw/IDBVersionChangeEvent[JC] def `type`: String
 raw/IDBVersionChangeEventInit[JT] var bubbles: js.UndefOr[Boolean]
 raw/IDBVersionChangeEventInit[JT] var cancelable: js.UndefOr[Boolean]
 raw/IDBVersionChangeEventInit[JT] var composed: js.UndefOr[Boolean]
-raw/IDBVersionChangeEventInit[JT] var newVersion: js.UndefOr[Int]
+raw/IDBVersionChangeEventInit[JT] var newVersion: js.UndefOr[Integer]
 raw/IDBVersionChangeEventInit[JT] var oldVersion: js.UndefOr[Int]
 raw/IDBVersionChangeEventInit[JT] var scoped: js.UndefOr[Boolean]
 raw/ImageData[JC] def data: js.Array[Int]
diff --git a/src/main/scala/org/scalajs/dom/raw/Idb.scala b/src/main/scala/org/scalajs/dom/raw/Idb.scala
index d71ed41e4..60f97c440 100644
--- a/src/main/scala/org/scalajs/dom/raw/Idb.scala
+++ b/src/main/scala/org/scalajs/dom/raw/Idb.scala
@@ -123,7 +123,7 @@ class IDBObjectStore extends js.Object {
 }
 
 trait IDBVersionChangeEventInit extends EventInit {
-  var newVersion: js.UndefOr[Int] = js.undefined
+  var newVersion: js.UndefOr[Integer] = js.undefined
   var oldVersion: js.UndefOr[Int] = js.undefined
 }
 
@@ -142,9 +142,11 @@ class IDBVersionChangeEvent(typeArg: String,
   /**
    * Returns the new version of the database.
    *
+   * This is null when the database is being deleted.
+   *
    * MDN
    */
-  def newVersion: Int = js.native
+  def newVersion: Integer = js.native
 
   /**
    * Returns the old version of the database.