diff --git a/baselines/audioworklet.generated.d.ts b/baselines/audioworklet.generated.d.ts
index 6c7ca221..48cea5cd 100644
--- a/baselines/audioworklet.generated.d.ts
+++ b/baselines/audioworklet.generated.d.ts
@@ -291,6 +291,8 @@ declare var ByteLengthQueuingStrategy: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CompressionStream) */
 interface CompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var CompressionStream: {
@@ -411,6 +413,8 @@ declare var DOMException: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DecompressionStream) */
 interface DecompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var DecompressionStream: {
@@ -786,7 +790,7 @@ interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
 
 declare var ReadableStreamBYOBReader: {
     prototype: ReadableStreamBYOBReader;
-    new(stream: ReadableStream): ReadableStreamBYOBReader;
+    new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader;
 };
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBRequest) */
diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index ce55651b..7aac39ee 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -5844,6 +5844,8 @@ declare var CompositionEvent: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CompressionStream) */
 interface CompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var CompressionStream: {
@@ -6694,6 +6696,8 @@ declare var DataTransferItemList: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DecompressionStream) */
 interface DecompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var DecompressionStream: {
@@ -18266,7 +18270,7 @@ interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
 
 declare var ReadableStreamBYOBReader: {
     prototype: ReadableStreamBYOBReader;
-    new(stream: ReadableStream): ReadableStreamBYOBReader;
+    new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader;
 };
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBRequest) */
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index 5cdec894..e55b3bb5 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -1640,6 +1640,8 @@ declare var CloseEvent: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CompressionStream) */
 interface CompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var CompressionStream: {
@@ -2044,6 +2046,8 @@ declare var DOMStringList: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DecompressionStream) */
 interface DecompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var DecompressionStream: {
@@ -4491,7 +4495,7 @@ interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
 
 declare var ReadableStreamBYOBReader: {
     prototype: ReadableStreamBYOBReader;
-    new(stream: ReadableStream): ReadableStreamBYOBReader;
+    new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader;
 };
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBRequest) */
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index 9ad14b70..d51f2c45 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -1567,6 +1567,8 @@ declare var CloseEvent: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CompressionStream) */
 interface CompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var CompressionStream: {
@@ -1971,6 +1973,8 @@ declare var DOMStringList: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DecompressionStream) */
 interface DecompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var DecompressionStream: {
@@ -4325,7 +4329,7 @@ interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
 
 declare var ReadableStreamBYOBReader: {
     prototype: ReadableStreamBYOBReader;
-    new(stream: ReadableStream): ReadableStreamBYOBReader;
+    new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader;
 };
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBRequest) */
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index fd3efc67..8b2354d8 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -1787,6 +1787,8 @@ declare var CloseEvent: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CompressionStream) */
 interface CompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var CompressionStream: {
@@ -2191,6 +2193,8 @@ declare var DOMStringList: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DecompressionStream) */
 interface DecompressionStream extends GenericTransformStream {
+    readonly readable: ReadableStream<Uint8Array>;
+    readonly writable: WritableStream<BufferSource>;
 }
 
 declare var DecompressionStream: {
@@ -4839,7 +4843,7 @@ interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
 
 declare var ReadableStreamBYOBReader: {
     prototype: ReadableStreamBYOBReader;
-    new(stream: ReadableStream): ReadableStreamBYOBReader;
+    new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader;
 };
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/ReadableStreamBYOBRequest) */
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index b18dc06e..94d38d86 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -2697,6 +2697,18 @@
                 }
             },
             "ReadableStreamBYOBReader": {
+                "constructor": {
+                    "signature": {
+                        "0": {
+                            "param": [
+                                {
+                                    "name": "stream",
+                                    "overrideType": "ReadableStream<Uint8Array>"
+                                }
+                            ]
+                        }
+                    }
+                },
                 "methods": {
                     "method": {
                         "read": {
@@ -2987,6 +2999,38 @@
                     }
                 }
             },
+            "CompressionStream": {
+                "properties": {
+                    "property": {
+                        "readable": {
+                            "name": "readable",
+                            "readonly": true,
+                            "overrideType": "ReadableStream<Uint8Array>"
+                        },
+                        "writable": {
+                            "name": "writable",
+                            "readonly": true,
+                            "overrideType": "WritableStream<BufferSource>"
+                        }
+                    }
+                }
+            },
+            "DecompressionStream": {
+                "properties": {
+                    "property": {
+                        "readable": {
+                            "name": "readable",
+                            "readonly": true,
+                            "overrideType": "ReadableStream<Uint8Array>"
+                        },
+                        "writable": {
+                            "name": "writable",
+                            "readonly": true,
+                            "overrideType": "WritableStream<BufferSource>"
+                        }
+                    }
+                }
+            },
             "TextDecoderStream": {
                 "properties": {
                     "property": {