diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 9839e4bd3..e8b9b3771 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -15115,7 +15115,7 @@ interface ImageDecoder {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/complete) */
     readonly complete: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/completed) */
-    readonly completed: Promise<undefined>;
+    readonly completed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/tracks) */
     readonly tracks: ImageTrackList;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/type) */
@@ -15157,7 +15157,7 @@ interface ImageTrackList {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/length) */
     readonly length: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedIndex) */
     readonly selectedIndex: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedTrack) */
@@ -24149,12 +24149,12 @@ declare var VideoPlaybackQuality: {
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition) */
 interface ViewTransition {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/finished) */
-    readonly finished: Promise<undefined>;
+    readonly finished: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     types: ViewTransitionTypeSet;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/updateCallbackDone) */
-    readonly updateCallbackDone: Promise<undefined>;
+    readonly updateCallbackDone: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/skipTransition) */
     skipTransition(): void;
 }
diff --git a/baselines/ts5.5/audioworklet.generated.d.ts b/baselines/ts5.5/audioworklet.generated.d.ts
index e23e869a6..4753a3267 100644
--- a/baselines/ts5.5/audioworklet.generated.d.ts
+++ b/baselines/ts5.5/audioworklet.generated.d.ts
@@ -857,7 +857,7 @@ declare var ReadableStreamDefaultReader: {
 
 interface ReadableStreamGenericReader {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/cancel) */
     cancel(reason?: any): Promise<void>;
 }
@@ -1152,11 +1152,11 @@ declare var WritableStreamDefaultController: {
  */
 interface WritableStreamDefaultWriter<W = any> {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/desiredSize) */
     readonly desiredSize: number | null;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/abort) */
     abort(reason?: any): Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/close) */
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index c6bcd2d9f..bee832b37 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -15095,7 +15095,7 @@ interface ImageDecoder {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/complete) */
     readonly complete: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/completed) */
-    readonly completed: Promise<undefined>;
+    readonly completed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/tracks) */
     readonly tracks: ImageTrackList;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/type) */
@@ -15137,7 +15137,7 @@ interface ImageTrackList {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/length) */
     readonly length: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedIndex) */
     readonly selectedIndex: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedTrack) */
@@ -19592,7 +19592,7 @@ declare var ReadableStreamDefaultReader: {
 
 interface ReadableStreamGenericReader {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/cancel) */
     cancel(reason?: any): Promise<void>;
 }
@@ -24127,12 +24127,12 @@ declare var VideoPlaybackQuality: {
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition) */
 interface ViewTransition {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/finished) */
-    readonly finished: Promise<undefined>;
+    readonly finished: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     types: ViewTransitionTypeSet;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/updateCallbackDone) */
-    readonly updateCallbackDone: Promise<undefined>;
+    readonly updateCallbackDone: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ViewTransition/skipTransition) */
     skipTransition(): void;
 }
@@ -26723,7 +26723,7 @@ interface WebTransport {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/incomingUnidirectionalStreams) */
     readonly incomingUnidirectionalStreams: ReadableStream;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/close) */
     close(closeInfo?: WebTransportCloseInfo): void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/createBidirectionalStream) */
@@ -27337,11 +27337,11 @@ declare var WritableStreamDefaultController: {
  */
 interface WritableStreamDefaultWriter<W = any> {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/desiredSize) */
     readonly desiredSize: number | null;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/abort) */
     abort(reason?: any): Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/close) */
diff --git a/baselines/ts5.5/serviceworker.generated.d.ts b/baselines/ts5.5/serviceworker.generated.d.ts
index 30cda9881..8d65ce292 100644
--- a/baselines/ts5.5/serviceworker.generated.d.ts
+++ b/baselines/ts5.5/serviceworker.generated.d.ts
@@ -194,7 +194,7 @@ interface ExtendableMessageEventInit extends ExtendableEventInit {
 
 interface FetchEventInit extends ExtendableEventInit {
     clientId?: string;
-    handled?: Promise<undefined>;
+    handled?: Promise<void>;
     preloadResponse?: Promise<any>;
     replacesClientId?: string;
     request: Request;
@@ -2517,7 +2517,7 @@ interface FetchEvent extends ExtendableEvent {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/clientId) */
     readonly clientId: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/handled) */
-    readonly handled: Promise<undefined>;
+    readonly handled: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/preloadResponse) */
     readonly preloadResponse: Promise<any>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/request) */
@@ -4652,7 +4652,7 @@ declare var ReadableStreamDefaultReader: {
 
 interface ReadableStreamGenericReader {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/cancel) */
     cancel(reason?: any): Promise<void>;
 }
@@ -7910,7 +7910,7 @@ interface WebTransport {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/incomingUnidirectionalStreams) */
     readonly incomingUnidirectionalStreams: ReadableStream;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/close) */
     close(closeInfo?: WebTransportCloseInfo): void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/createBidirectionalStream) */
@@ -8212,11 +8212,11 @@ declare var WritableStreamDefaultController: {
  */
 interface WritableStreamDefaultWriter<W = any> {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/desiredSize) */
     readonly desiredSize: number | null;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/abort) */
     abort(reason?: any): Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/close) */
diff --git a/baselines/ts5.5/sharedworker.generated.d.ts b/baselines/ts5.5/sharedworker.generated.d.ts
index 9068ec8e5..8b92beb87 100644
--- a/baselines/ts5.5/sharedworker.generated.d.ts
+++ b/baselines/ts5.5/sharedworker.generated.d.ts
@@ -4484,7 +4484,7 @@ declare var ReadableStreamDefaultReader: {
 
 interface ReadableStreamGenericReader {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/cancel) */
     cancel(reason?: any): Promise<void>;
 }
@@ -7721,7 +7721,7 @@ interface WebTransport {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/incomingUnidirectionalStreams) */
     readonly incomingUnidirectionalStreams: ReadableStream;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/close) */
     close(closeInfo?: WebTransportCloseInfo): void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/createBidirectionalStream) */
@@ -8035,11 +8035,11 @@ declare var WritableStreamDefaultController: {
  */
 interface WritableStreamDefaultWriter<W = any> {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/desiredSize) */
     readonly desiredSize: number | null;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/abort) */
     abort(reason?: any): Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/close) */
diff --git a/baselines/ts5.5/webworker.generated.d.ts b/baselines/ts5.5/webworker.generated.d.ts
index e2b2b0b76..95a6fad1b 100644
--- a/baselines/ts5.5/webworker.generated.d.ts
+++ b/baselines/ts5.5/webworker.generated.d.ts
@@ -274,7 +274,7 @@ interface ExtendableMessageEventInit extends ExtendableEventInit {
 
 interface FetchEventInit extends ExtendableEventInit {
     clientId?: string;
-    handled?: Promise<undefined>;
+    handled?: Promise<void>;
     preloadResponse?: Promise<any>;
     replacesClientId?: string;
     request: Request;
@@ -2955,7 +2955,7 @@ interface FetchEvent extends ExtendableEvent {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/clientId) */
     readonly clientId: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/handled) */
-    readonly handled: Promise<undefined>;
+    readonly handled: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/preloadResponse) */
     readonly preloadResponse: Promise<any>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/FetchEvent/request) */
@@ -4125,7 +4125,7 @@ interface ImageDecoder {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/complete) */
     readonly complete: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/completed) */
-    readonly completed: Promise<undefined>;
+    readonly completed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/tracks) */
     readonly tracks: ImageTrackList;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/type) */
@@ -4167,7 +4167,7 @@ interface ImageTrackList {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/length) */
     readonly length: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedIndex) */
     readonly selectedIndex: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedTrack) */
@@ -5351,7 +5351,7 @@ declare var ReadableStreamDefaultReader: {
 
 interface ReadableStreamGenericReader {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBReader/cancel) */
     cancel(reason?: any): Promise<void>;
 }
@@ -8779,7 +8779,7 @@ interface WebTransport {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/incomingUnidirectionalStreams) */
     readonly incomingUnidirectionalStreams: ReadableStream;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/close) */
     close(closeInfo?: WebTransportCloseInfo): void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebTransport/createBidirectionalStream) */
@@ -9114,11 +9114,11 @@ declare var WritableStreamDefaultController: {
  */
 interface WritableStreamDefaultWriter<W = any> {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/closed) */
-    readonly closed: Promise<undefined>;
+    readonly closed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/desiredSize) */
     readonly desiredSize: number | null;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/abort) */
     abort(reason?: any): Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/WritableStreamDefaultWriter/close) */
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 2e16e1812..95a6fad1b 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -4125,7 +4125,7 @@ interface ImageDecoder {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/complete) */
     readonly complete: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/completed) */
-    readonly completed: Promise<undefined>;
+    readonly completed: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/tracks) */
     readonly tracks: ImageTrackList;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageDecoder/type) */
@@ -4167,7 +4167,7 @@ interface ImageTrackList {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/length) */
     readonly length: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/ready) */
-    readonly ready: Promise<undefined>;
+    readonly ready: Promise<void>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedIndex) */
     readonly selectedIndex: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ImageTrackList/selectedTrack) */
diff --git a/inputfiles/knownTypes.json b/inputfiles/knownTypes.json
index fcb6b0761..d0ba44099 100644
--- a/inputfiles/knownTypes.json
+++ b/inputfiles/knownTypes.json
@@ -20,7 +20,6 @@
         "ClientTypes",
         "CompositeOperationOrAuto",
         "ComputedKeyframe",
-        "CryptoKeyPair",
         "DisplayCaptureSurfaceType",
         "EcdhKeyDeriveParams",
         "EcdsaParams",
@@ -75,7 +74,6 @@
         "AesKeyGenParams",
         "BigInteger",
         "ClientTypes",
-        "CryptoKeyPair",
         "EcdhKeyDeriveParams",
         "EcdsaParams",
         "EcKeyGenParams",
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index 9094266a0..859ce6150 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -1694,10 +1694,7 @@
                                             "name": "algorithm",
                                             "additionalTypes": ["RsaOaepParams", "AesCtrParams", "AesCbcParams", "AesGcmParams"]
                                         }
-                                    ],
-                                    "subtype": {
-                                      "type": "ArrayBuffer"
-                                    }
+                                    ]
                                 }
                             }
                         },
@@ -1746,10 +1743,7 @@
                                             "name": "algorithm",
                                             "additionalTypes": ["RsaOaepParams", "AesCtrParams", "AesCbcParams", "AesGcmParams"]
                                         }
-                                    ],
-                                    "subtype": {
-                                      "type": "ArrayBuffer"
-                                    }
+                                    ]
                                 }
                             }
                         },