diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 112a707d5..c5ac972b6 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -36713,7 +36713,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index 02b5f0403..d94ec767e 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -10486,7 +10486,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index 5bb63c4f4..82be54b49 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -10029,7 +10029,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index 566f7f4bd..fba6edfb7 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -36690,7 +36690,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/serviceworker.generated.d.ts b/baselines/ts5.5/serviceworker.generated.d.ts
index 295e1756e..06718bcb5 100644
--- a/baselines/ts5.5/serviceworker.generated.d.ts
+++ b/baselines/ts5.5/serviceworker.generated.d.ts
@@ -10486,7 +10486,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/sharedworker.generated.d.ts b/baselines/ts5.5/sharedworker.generated.d.ts
index 4fb5c5f83..a8e0ea796 100644
--- a/baselines/ts5.5/sharedworker.generated.d.ts
+++ b/baselines/ts5.5/sharedworker.generated.d.ts
@@ -10029,7 +10029,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/webworker.generated.d.ts b/baselines/ts5.5/webworker.generated.d.ts
index 63867da88..553c39616 100644
--- a/baselines/ts5.5/webworker.generated.d.ts
+++ b/baselines/ts5.5/webworker.generated.d.ts
@@ -11920,7 +11920,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 9997a7f0b..d11b58713 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -36713,7 +36713,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/serviceworker.generated.d.ts b/baselines/ts5.6/serviceworker.generated.d.ts
index 295e1756e..06718bcb5 100644
--- a/baselines/ts5.6/serviceworker.generated.d.ts
+++ b/baselines/ts5.6/serviceworker.generated.d.ts
@@ -10486,7 +10486,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/sharedworker.generated.d.ts b/baselines/ts5.6/sharedworker.generated.d.ts
index 4fb5c5f83..a8e0ea796 100644
--- a/baselines/ts5.6/sharedworker.generated.d.ts
+++ b/baselines/ts5.6/sharedworker.generated.d.ts
@@ -10029,7 +10029,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/webworker.generated.d.ts b/baselines/ts5.6/webworker.generated.d.ts
index 63867da88..553c39616 100644
--- a/baselines/ts5.6/webworker.generated.d.ts
+++ b/baselines/ts5.6/webworker.generated.d.ts
@@ -11920,7 +11920,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 41d032889..ed17bad3d 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -11920,7 +11920,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index 8a7e0851f..5f1572b1d 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -1962,6 +1962,14 @@
                             "type": "MessageEvent"
                         }
                     ]
+                },
+                "properties": {
+                    "property": {
+                        "readyState": {
+                            "name": "readyState",
+                            "overrideType": "typeof WebSocket.CONNECTING | typeof WebSocket.OPEN | typeof WebSocket.CLOSING | typeof WebSocket.CLOSED"
+                        }
+                    }
                 }
             },
             "WebTransportDatagramDuplexStream": {