diff --git a/types/dplayer/dplayer-tests.ts b/types/dplayer/dplayer-tests.ts
index 3d4a7a311f32c4..f1635e5e84e4c7 100644
--- a/types/dplayer/dplayer-tests.ts
+++ b/types/dplayer/dplayer-tests.ts
@@ -16,3 +16,9 @@ const dp = new DPlayer({
         api: "https://api.prprpr.me/dplayer3/",
     },
 });
+
+// $ExpectType void
+dp.on("play", () => {});
+
+// @ts-expect-error
+dp.on("unknown", () => {});
diff --git a/types/dplayer/index.d.ts b/types/dplayer/index.d.ts
index 3794fe72807eef..9ba59e2ee656a0 100644
--- a/types/dplayer/index.d.ts
+++ b/types/dplayer/index.d.ts
@@ -172,7 +172,7 @@ export default class DPlayer {
 
     toggle(): void;
 
-    on(event: DPlayerEvents, handler: () => void): void;
+    on(event: keyof typeof DPlayerEvents, handler: () => void): void;
 
     switchVideo(video: DPlayerVideo, danmaku: DPlayerDanmaku): void;