diff --git a/api-reports/2_12.txt b/api-reports/2_12.txt
index ccb3ba3dd..5aec0d7e8 100644
--- a/api-reports/2_12.txt
+++ b/api-reports/2_12.txt
@@ -15174,7 +15174,7 @@ raw/IDBOpenDBRequest[JC] def addEventListener[T <: Event](`type`: String, listen
 raw/IDBOpenDBRequest[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
 raw/IDBOpenDBRequest[JC] def dispatchEvent(evt: Event): Boolean
 raw/IDBOpenDBRequest[JC] def error: DOMException
-raw/IDBOpenDBRequest[JC] var onblocked: js.Function1[Event, _]
+raw/IDBOpenDBRequest[JC] var onblocked: js.Function1[IDBVersionChangeEvent, _]
 raw/IDBOpenDBRequest[JC] var onerror: js.Function1[Event, _]
 raw/IDBOpenDBRequest[JC] var onsuccess: js.Function1[Event, _]
 raw/IDBOpenDBRequest[JC] var onupgradeneeded: js.Function1[IDBVersionChangeEvent, _]
diff --git a/api-reports/2_13.txt b/api-reports/2_13.txt
index c3d6a4f30..a29f5a98c 100644
--- a/api-reports/2_13.txt
+++ b/api-reports/2_13.txt
@@ -15174,7 +15174,7 @@ raw/IDBOpenDBRequest[JC] def addEventListener[T <: Event](`type`: String, listen
 raw/IDBOpenDBRequest[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
 raw/IDBOpenDBRequest[JC] def dispatchEvent(evt: Event): Boolean
 raw/IDBOpenDBRequest[JC] def error: DOMException
-raw/IDBOpenDBRequest[JC] var onblocked: js.Function1[Event, _]
+raw/IDBOpenDBRequest[JC] var onblocked: js.Function1[IDBVersionChangeEvent, _]
 raw/IDBOpenDBRequest[JC] var onerror: js.Function1[Event, _]
 raw/IDBOpenDBRequest[JC] var onsuccess: js.Function1[Event, _]
 raw/IDBOpenDBRequest[JC] var onupgradeneeded: js.Function1[IDBVersionChangeEvent, _]
diff --git a/src/main/scala/org/scalajs/dom/raw/Idb.scala b/src/main/scala/org/scalajs/dom/raw/Idb.scala
index 60f97c440..2fba1decc 100644
--- a/src/main/scala/org/scalajs/dom/raw/Idb.scala
+++ b/src/main/scala/org/scalajs/dom/raw/Idb.scala
@@ -693,7 +693,7 @@ class IDBOpenDBRequest extends IDBRequest {
    *
    * MDN
    */
-  var onblocked: js.Function1[Event, _] = js.native
+  var onblocked: js.Function1[IDBVersionChangeEvent, _] = js.native
 }
 
 /**