diff --git a/index.d.ts b/index.d.ts
index de8c253e..29ef3435 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -788,6 +788,7 @@ declare class ReadableStream {
   pipeThrough(transform: ReadableStreamTransform, options?: PipeToOptions): ReadableStream;
   pipeTo(destination: WritableStream, options?: PipeToOptions): Promise<void>;
   tee(): [ReadableStream, ReadableStream];
+  values(options?: ReadableStreamValuesOptions): ReadableStreamReadableStreamAsyncIterator;
 }
 
 declare class ReadableStreamBYOBReader {
@@ -833,6 +834,12 @@ declare type ReadableStreamPipeToOptions = PipeToOptions;
 
 declare type ReadableStreamReadResult<T = any> = { done: true; value: undefined; } | { done: false; value: T; };
 
+declare class ReadableStreamReadableStreamAsyncIterator {
+  constructor(underlyingSource?: Object, queuingStrategy?: Object);
+  next(): Promise<ReadableStreamReadResult<any>>;
+  return(reason?: any): Promise<ReadableStreamReadResult<any>>;
+}
+
 /**
  * Back-compat alias.
  * @deprecated Use ReadableStreamBYOBReader
@@ -850,6 +857,10 @@ interface ReadableStreamTransform {
   readable: ReadableStream;
 }
 
+interface ReadableStreamValuesOptions {
+  preventCancel?: boolean;
+}
+
 declare class Request extends Body {
   constructor(input: Request | string, init?: RequestInit | Request);
   clone(): Request;
diff --git a/src/workers.json b/src/workers.json
index 056c377f..99c2ec51 100644
--- a/src/workers.json
+++ b/src/workers.json
@@ -6930,6 +6930,23 @@
             ]
           }
         }
+      },
+      {
+        "name": "values",
+        "type": {
+          "params": [
+            {
+              "name": "options",
+              "type": {
+                "name": "ReadableStreamValuesOptions",
+                "optional": true
+              }
+            }
+          ],
+          "returns": {
+            "name": "ReadableStreamReadableStreamAsyncIterator"
+          }
+        }
       }
     ],
     "kind": "class"
@@ -7346,6 +7363,79 @@
     ],
     "kind": "typedef"
   },
+  "ReadableStreamReadableStreamAsyncIterator": {
+    "name": "ReadableStreamReadableStreamAsyncIterator",
+    "members": [
+      {
+        "name": "constructor",
+        "type": {
+          "params": [
+            {
+              "name": "underlyingSource",
+              "type": {
+                "name": "Object",
+                "optional": true
+              }
+            },
+            {
+              "name": "queuingStrategy",
+              "type": {
+                "name": "Object",
+                "optional": true
+              }
+            }
+          ]
+        }
+      },
+      {
+        "name": "next",
+        "type": {
+          "params": [],
+          "returns": {
+            "name": "Promise",
+            "args": [
+              {
+                "name": "ReadableStreamReadResult",
+                "args": [
+                  {
+                    "name": "any"
+                  }
+                ]
+              }
+            ]
+          }
+        }
+      },
+      {
+        "name": "return",
+        "type": {
+          "params": [
+            {
+              "name": "reason",
+              "type": {
+                "name": "any",
+                "optional": true
+              }
+            }
+          ],
+          "returns": {
+            "name": "Promise",
+            "args": [
+              {
+                "name": "ReadableStreamReadResult",
+                "args": [
+                  {
+                    "name": "any"
+                  }
+                ]
+              }
+            ]
+          }
+        }
+      }
+    ],
+    "kind": "class"
+  },
   "ReadableStreamReadableStreamBYOBReader": {
     "name": "ReadableStreamReadableStreamBYOBReader",
     "type": {
@@ -7386,6 +7476,19 @@
     ],
     "kind": "struct"
   },
+  "ReadableStreamValuesOptions": {
+    "name": "ReadableStreamValuesOptions",
+    "members": [
+      {
+        "name": "preventCancel",
+        "type": {
+          "name": "boolean",
+          "optional": true
+        }
+      }
+    ],
+    "kind": "struct"
+  },
   "Request": {
     "name": "Request",
     "members": [