diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 6ddc04597..9ab2d12d6 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -8873,13 +8873,13 @@ declare var IDBObjectStore: {
 };
 
 interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
-    "blocked": Event;
+    "blocked": IDBVersionChangeEvent;
     "upgradeneeded": IDBVersionChangeEvent;
 }
 
 /** Also inherits methods from its parents IDBRequest and EventTarget. */
 interface IDBOpenDBRequest extends IDBRequest<IDBDatabase> {
-    onblocked: ((this: IDBOpenDBRequest, ev: Event) => any) | null;
+    onblocked: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     onupgradeneeded: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index 408f59faa..8b1506c6d 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -1969,13 +1969,13 @@ declare var IDBObjectStore: {
 };
 
 interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
-    "blocked": Event;
+    "blocked": IDBVersionChangeEvent;
     "upgradeneeded": IDBVersionChangeEvent;
 }
 
 /** Also inherits methods from its parents IDBRequest and EventTarget. */
 interface IDBOpenDBRequest extends IDBRequest<IDBDatabase> {
-    onblocked: ((this: IDBOpenDBRequest, ev: Event) => any) | null;
+    onblocked: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     onupgradeneeded: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index b1d3022bc..6e13061f3 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -1888,13 +1888,13 @@ declare var IDBObjectStore: {
 };
 
 interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
-    "blocked": Event;
+    "blocked": IDBVersionChangeEvent;
     "upgradeneeded": IDBVersionChangeEvent;
 }
 
 /** Also inherits methods from its parents IDBRequest and EventTarget. */
 interface IDBOpenDBRequest extends IDBRequest<IDBDatabase> {
-    onblocked: ((this: IDBOpenDBRequest, ev: Event) => any) | null;
+    onblocked: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     onupgradeneeded: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index b88cc7c14..ddba1d974 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -2044,13 +2044,13 @@ declare var IDBObjectStore: {
 };
 
 interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
-    "blocked": Event;
+    "blocked": IDBVersionChangeEvent;
     "upgradeneeded": IDBVersionChangeEvent;
 }
 
 /** Also inherits methods from its parents IDBRequest and EventTarget. */
 interface IDBOpenDBRequest extends IDBRequest<IDBDatabase> {
-    onblocked: ((this: IDBOpenDBRequest, ev: Event) => any) | null;
+    onblocked: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     onupgradeneeded: ((this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any) | null;
     addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;