diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index b7397329c..674888b05 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -28395,7 +28395,7 @@ interface Window extends EventTarget, AnimationFrameProvider, GlobalEventHandler
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/window) */
     readonly window: Window & typeof globalThis;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/alert) */
-    alert(message?: any): void;
+    alert(message?: string): void;
     /**
      * @deprecated
      *
@@ -30048,7 +30048,7 @@ declare var visualViewport: VisualViewport | null;
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/window) */
 declare var window: Window & typeof globalThis;
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/alert) */
-declare function alert(message?: any): void;
+declare function alert(message?: string): void;
 /**
  * @deprecated
  *
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index a42edf323..8b260796a 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -28373,7 +28373,7 @@ interface Window extends EventTarget, AnimationFrameProvider, GlobalEventHandler
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/window) */
     readonly window: Window & typeof globalThis;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/alert) */
-    alert(message?: any): void;
+    alert(message?: string): void;
     /**
      * @deprecated
      *
@@ -30026,7 +30026,7 @@ declare var visualViewport: VisualViewport | null;
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/window) */
 declare var window: Window & typeof globalThis;
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/alert) */
-declare function alert(message?: any): void;
+declare function alert(message?: string): void;
 /**
  * @deprecated
  *
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 52f215bd0..4081229dc 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -28395,7 +28395,7 @@ interface Window extends EventTarget, AnimationFrameProvider, GlobalEventHandler
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/window) */
     readonly window: Window & typeof globalThis;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/alert) */
-    alert(message?: any): void;
+    alert(message?: string): void;
     /**
      * @deprecated
      *
@@ -30048,7 +30048,7 @@ declare var visualViewport: VisualViewport | null;
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/window) */
 declare var window: Window & typeof globalThis;
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/alert) */
-declare function alert(message?: any): void;
+declare function alert(message?: string): void;
 /**
  * @deprecated
  *
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index a64507320..bb52b1bf2 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -718,7 +718,7 @@
                     "method": {
                         "alert": {
                             "overrideSignatures": [
-                                "alert(message?: any): void"
+                                "alert(message?: string): void"
                             ]
                         },
                         "postMessage": {