diff --git a/.changeset/short-pigs-collect.md b/.changeset/short-pigs-collect.md
new file mode 100644
index 00000000..597da2e5
--- /dev/null
+++ b/.changeset/short-pigs-collect.md
@@ -0,0 +1,5 @@
+---
+"@cloudflare/workers-types": patch
+---
+
+Updated auto-generated types @ 2022-01-15
diff --git a/index.d.ts b/index.d.ts
index 131161d3..ab63298a 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -463,6 +463,14 @@ interface Element {
   remove(): Element;
   removeAndKeepContent(): Element;
   setInnerContent(content: Content, options?: ContentOptions): Element;
+  onEndTag(handler: Function): void;
+}
+
+interface EndTag {
+  name: string;
+  before(content: Content, options?: ContentOptions): EndTag;
+  after(content: Content, options?: ContentOptions): EndTag;
+  remove(): EndTag;
 }
 
 declare class Event {
@@ -778,32 +786,29 @@ interface JsonWebKey {
  * Workers KV is a global, low-latency, key-value data store. It supports exceptionally high read volumes with low-latency,
  * making it possible to build highly dynamic APIs and websites which respond as quickly as a cached static file would.
  */
-interface KVNamespace {
+interface KVNamespace<K extends string = string> {
   get(
-    key: string,
+    key: K,
     options?: Partial<KVNamespaceGetOptions<undefined>>
   ): Promise<string | null>;
-  get(key: string, type: "text"): Promise<string | null>;
+  get(key: K, type: "text"): Promise<string | null>;
   get<ExpectedValue = unknown>(
-    key: string,
+    key: K,
     type: "json"
   ): Promise<ExpectedValue | null>;
-  get(key: string, type: "arrayBuffer"): Promise<ArrayBuffer | null>;
-  get(key: string, type: "stream"): Promise<ReadableStream | null>;
-  get(
-    key: string,
-    options: KVNamespaceGetOptions<"text">
-  ): Promise<string | null>;
+  get(key: K, type: "arrayBuffer"): Promise<ArrayBuffer | null>;
+  get(key: K, type: "stream"): Promise<ReadableStream | null>;
+  get(key: K, options: KVNamespaceGetOptions<"text">): Promise<string | null>;
   get<ExpectedValue = unknown>(
     key: string,
     options: KVNamespaceGetOptions<"json">
   ): Promise<ExpectedValue | null>;
   get(
-    key: string,
+    key: K,
     options: KVNamespaceGetOptions<"arrayBuffer">
   ): Promise<ArrayBuffer | null>;
   get(
-    key: string,
+    key: K,
     options: KVNamespaceGetOptions<"stream">
   ): Promise<ReadableStream | null>;
   list<Metadata = unknown>(
@@ -818,44 +823,44 @@ interface KVNamespace {
    * await NAMESPACE.put(key, value)
    */
   put(
-    key: string,
+    key: K,
     value: string | ArrayBuffer | ArrayBufferView | ReadableStream,
     options?: KVNamespacePutOptions
   ): Promise<void>;
   getWithMetadata<Metadata = unknown>(
-    key: string,
+    key: K,
     options?: Partial<KVNamespaceGetOptions<undefined>>
   ): Promise<KVNamespaceGetWithMetadataResult<string, Metadata>>;
   getWithMetadata<Metadata = unknown>(
-    key: string,
+    key: K,
     type: "text"
   ): Promise<KVNamespaceGetWithMetadataResult<string, Metadata>>;
   getWithMetadata<ExpectedValue = unknown, Metadata = unknown>(
-    key: string,
+    key: K,
     type: "json"
   ): Promise<KVNamespaceGetWithMetadataResult<ExpectedValue, Metadata>>;
   getWithMetadata<Metadata = unknown>(
-    key: string,
+    key: K,
     type: "arrayBuffer"
   ): Promise<KVNamespaceGetWithMetadataResult<ArrayBuffer, Metadata>>;
   getWithMetadata<Metadata = unknown>(
-    key: string,
+    key: K,
     type: "stream"
   ): Promise<KVNamespaceGetWithMetadataResult<ReadableStream, Metadata>>;
   getWithMetadata<Metadata = unknown>(
-    key: string,
+    key: K,
     options: KVNamespaceGetOptions<"text">
   ): Promise<KVNamespaceGetWithMetadataResult<string, Metadata>>;
   getWithMetadata<ExpectedValue = unknown, Metadata = unknown>(
-    key: string,
+    key: K,
     options: KVNamespaceGetOptions<"json">
   ): Promise<KVNamespaceGetWithMetadataResult<ExpectedValue, Metadata>>;
   getWithMetadata<Metadata = unknown>(
-    key: string,
+    key: K,
     options: KVNamespaceGetOptions<"arrayBuffer">
   ): Promise<KVNamespaceGetWithMetadataResult<ArrayBuffer, Metadata>>;
   getWithMetadata<Metadata = unknown>(
-    key: string,
+    key: K,
     options: KVNamespaceGetOptions<"stream">
   ): Promise<KVNamespaceGetWithMetadataResult<ReadableStream, Metadata>>;
   delete(name: string): Promise<void>;
@@ -930,7 +935,7 @@ interface ReadResult {
   done: boolean;
 }
 
-interface ReadableByteStreamController {
+declare abstract class ReadableByteStreamController {
   readonly byobRequest: ReadableStreamBYOBRequest | null;
   readonly desiredSize: number | null;
   close(): void;
@@ -950,6 +955,12 @@ declare class ReadableStream {
   ): ReadableStream;
   pipeTo(destination: WritableStream, options?: PipeToOptions): Promise<void>;
   tee(): [ReadableStream, ReadableStream];
+  values(
+    options?: ReadableStreamValuesOptions
+  ): AsyncIterableIterator<ReadableStreamReadResult>;
+  [Symbol.asyncIterator](
+    options?: ReadableStreamValuesOptions
+  ): AsyncIterableIterator<ReadableStreamReadResult>;
 }
 
 declare class ReadableStreamBYOBReader {
@@ -966,14 +977,14 @@ declare class ReadableStreamBYOBReader {
   ): Promise<ReadableStreamReadResult<Uint8Array>>;
 }
 
-interface ReadableStreamBYOBRequest {
+declare abstract class ReadableStreamBYOBRequest {
   readonly view: Uint8Array | null;
   respond(bytesWritten: number): void;
   respondWithNewView(view: ArrayBufferView): void;
   readonly atLeast: number | null;
 }
 
-interface ReadableStreamDefaultController {
+declare abstract class ReadableStreamDefaultController {
   readonly desiredSize: number | null;
   close(): void;
   enqueue(chunk?: any): void;
@@ -1020,6 +1031,10 @@ interface ReadableStreamTransform {
   readable: ReadableStream;
 }
 
+interface ReadableStreamValuesOptions {
+  preventCancel?: boolean;
+}
+
 declare class Request extends Body {
   constructor(input: Request | string, init?: RequestInit | Request);
   clone(): Request;
@@ -1586,7 +1601,7 @@ declare class WritableStream {
   getWriter(): WritableStreamDefaultWriter;
 }
 
-interface WritableStreamDefaultController {
+declare abstract class WritableStreamDefaultController {
   readonly signal: AbortSignal;
   error(reason?: any): void;
 }
diff --git a/src/workers.json b/src/workers.json
index 056c377f..ca030df1 100644
--- a/src/workers.json
+++ b/src/workers.json
@@ -3030,6 +3030,89 @@
             "name": "Element"
           }
         }
+      },
+      {
+        "name": "onEndTag",
+        "type": {
+          "params": [
+            {
+              "name": "handler",
+              "type": {
+                "name": "Function"
+              }
+            }
+          ],
+          "returns": {
+            "name": "void"
+          }
+        }
+      }
+    ],
+    "kind": "class"
+  },
+  "EndTag": {
+    "name": "EndTag",
+    "members": [
+      {
+        "name": "name",
+        "type": {
+          "name": "string"
+        }
+      },
+      {
+        "name": "before",
+        "type": {
+          "params": [
+            {
+              "name": "content",
+              "type": {
+                "name": "Content"
+              }
+            },
+            {
+              "name": "options",
+              "type": {
+                "name": "ContentOptions",
+                "optional": true
+              }
+            }
+          ],
+          "returns": {
+            "name": "EndTag"
+          }
+        }
+      },
+      {
+        "name": "after",
+        "type": {
+          "params": [
+            {
+              "name": "content",
+              "type": {
+                "name": "Content"
+              }
+            },
+            {
+              "name": "options",
+              "type": {
+                "name": "ContentOptions",
+                "optional": true
+              }
+            }
+          ],
+          "returns": {
+            "name": "EndTag"
+          }
+        }
+      },
+      {
+        "name": "remove",
+        "type": {
+          "params": [],
+          "returns": {
+            "name": "EndTag"
+          }
+        }
       }
     ],
     "kind": "class"
@@ -5417,7 +5500,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5463,7 +5546,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5498,7 +5581,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5541,7 +5624,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5576,7 +5659,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5611,7 +5694,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5699,7 +5782,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5739,7 +5822,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5814,7 +5897,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5881,7 +5964,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5935,7 +6018,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -5978,7 +6061,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -6027,7 +6110,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -6070,7 +6153,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -6113,7 +6196,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -6161,7 +6244,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -6215,7 +6298,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -6263,7 +6346,7 @@
             {
               "name": "key",
               "type": {
-                "name": "string"
+                "name": "K"
               }
             },
             {
@@ -6326,6 +6409,17 @@
         }
       }
     ],
+    "typeparams": [
+      {
+        "name": "K",
+        "constraint": {
+          "name": "string"
+        },
+        "default": {
+          "name": "string"
+        }
+      }
+    ],
     "comment": {
       "text": "Workers KV is a global, low-latency, key-value data store. It supports exceptionally high read volumes with low-latency,\nmaking it possible to build highly dynamic APIs and websites which respond as quickly as a cached static file would."
     },
@@ -6930,6 +7024,50 @@
             ]
           }
         }
+      },
+      {
+        "name": "values",
+        "type": {
+          "params": [
+            {
+              "name": "options",
+              "type": {
+                "name": "ReadableStreamValuesOptions",
+                "optional": true
+              }
+            }
+          ],
+          "returns": {
+            "name": "AsyncIterableIterator",
+            "args": [
+              {
+                "name": "ReadableStreamReadResult"
+              }
+            ]
+          }
+        }
+      },
+      {
+        "name": "[Symbol.asyncIterator]",
+        "type": {
+          "params": [
+            {
+              "name": "options",
+              "type": {
+                "name": "ReadableStreamValuesOptions",
+                "optional": true
+              }
+            }
+          ],
+          "returns": {
+            "name": "AsyncIterableIterator",
+            "args": [
+              {
+                "name": "ReadableStreamReadResult"
+              }
+            ]
+          }
+        }
       }
     ],
     "kind": "class"
@@ -7386,6 +7524,19 @@
     ],
     "kind": "struct"
   },
+  "ReadableStreamValuesOptions": {
+    "name": "ReadableStreamValuesOptions",
+    "members": [
+      {
+        "name": "preventCancel",
+        "type": {
+          "name": "boolean",
+          "optional": true
+        }
+      }
+    ],
+    "kind": "struct"
+  },
   "Request": {
     "name": "Request",
     "members": [
@@ -8835,6 +8986,58 @@
         "static": true,
         "readonly": true
       },
+      {
+        "name": "ReadableStreamBYOBRequest",
+        "type": {
+          "name": "typeof",
+          "args": [
+            {
+              "name": "ReadableStreamBYOBRequest"
+            }
+          ]
+        },
+        "static": true,
+        "readonly": true
+      },
+      {
+        "name": "ReadableStreamDefaultController",
+        "type": {
+          "name": "typeof",
+          "args": [
+            {
+              "name": "ReadableStreamDefaultController"
+            }
+          ]
+        },
+        "static": true,
+        "readonly": true
+      },
+      {
+        "name": "ReadableByteStreamController",
+        "type": {
+          "name": "typeof",
+          "args": [
+            {
+              "name": "ReadableByteStreamController"
+            }
+          ]
+        },
+        "static": true,
+        "readonly": true
+      },
+      {
+        "name": "WritableStreamDefaultController",
+        "type": {
+          "name": "typeof",
+          "args": [
+            {
+              "name": "WritableStreamDefaultController"
+            }
+          ]
+        },
+        "static": true,
+        "readonly": true
+      },
       {
         "name": "Headers",
         "type": {