diff --git a/inputfiles/addedTypes.jsonc b/inputfiles/addedTypes.jsonc
index 5b7586411..12d32ca4e 100644
--- a/inputfiles/addedTypes.jsonc
+++ b/inputfiles/addedTypes.jsonc
@@ -842,16 +842,6 @@
                     }
                 }
             },
-            "MemoryDescriptor": {
-                "members": {
-                    "member": {
-                        "shared": {
-                            "name": "shared",
-                            "type": "boolean"
-                        }
-                    }
-                }
-            },
             "ReadableStreamReadDoneResult": {
                 "name": "ReadableStreamReadDoneResult",
                 "typeParameters": [
@@ -952,50 +942,6 @@
                         }
                     }
                 }
-            },
-            "ValueTypeMap": {
-                "name": "ValueTypeMap",
-                "legacyNamespace": "WebAssembly",
-                "exposed":"Window Worker Worklet",
-                "members": {
-                    "member": {
-                        "anyfunc": {
-                            "name": "anyfunc",
-                            "overrideType": "Function",
-                            "required": 1
-                        },
-                        "externref": {
-                            "name": "externref",
-                            "overrideType": "any",
-                            "required": 1
-                        },
-                        "f32": {
-                            "name": "f32",
-                            "overrideType": "number",
-                            "required": 1
-                        },
-                        "f64": {
-                            "name": "f64",
-                            "overrideType": "number",
-                            "required": 1
-                        },
-                        "i32": {
-                            "name": "i32",
-                            "overrideType": "number",
-                            "required": 1
-                        },
-                        "i64": {
-                            "name": "i64",
-                            "overrideType": "bigint",
-                            "required": 1
-                        },
-                        "v128": {
-                            "name": "v128",
-                            "overrideType": "never",
-                            "required": 1
-                        }
-                    }
-                }
             }
         }
     },
diff --git a/inputfiles/patches/webassembly.kdl b/inputfiles/patches/webassembly.kdl
index 473600bc6..cd66192ab 100644
--- a/inputfiles/patches/webassembly.kdl
+++ b/inputfiles/patches/webassembly.kdl
@@ -1,3 +1,17 @@
 enum ImportExportKind legacyNamespace=WebAssembly
 enum TableKind legacyNamespace=WebAssembly
 enum AddressType legacyNamespace=WebAssembly
+
+dictionary ValueTypeMap legacyNamespace=WebAssembly {
+  member anyfunc required=#true type=Function
+  member externref required=#true type=any
+  member f32 required=#true type=long
+  member f64 required=#true type=long
+  member i32 required=#true type=long
+  member i64 required=#true type=bigint
+  member v128 required=#true overrideType=never
+}
+
+dictionary MemoryDescriptor {
+  member shared type=boolean
+}
diff --git a/package-lock.json b/package-lock.json
index c0174e939..3094e2751 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -409,8 +409,7 @@
       "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-7.1.18.tgz",
       "integrity": "sha512-RK4UylAXCRRWbJOFxua8qudPH6976wLeofn341Y/0qGBk+JLdnPIPV2nAg0O3EitSkaa9WiyWo05t0KWq6dfwA==",
       "dev": true,
-      "license": "CC0-1.0",
-      "peer": true
+      "license": "CC0-1.0"
     },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
@@ -465,7 +464,6 @@
       "integrity": "sha512-DhGl4xMVFGVIyMwswXeyzdL4uXD5OGILGX5N8Y+f6W7LhC1Ze2poSNrkF/fedpVDHEEZ+PHFW0vL14I+mm8K3Q==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@octokit/auth-token": "^6.0.0",
         "@octokit/graphql": "^9.0.3",
@@ -874,7 +872,6 @@
       "integrity": "sha512-BnOroVl1SgrPLywqxyqdJ4l3S2MsKVLDVxZvjI1Eoe8ev2r3kGDo+PcMihNmDE+6/KjkTubSJnmqGZZjQSBq/g==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@typescript-eslint/scope-manager": "8.46.2",
         "@typescript-eslint/types": "8.46.2",
@@ -1221,7 +1218,6 @@
       "integrity": "sha512-Y3ytN2KguJMNBgigmgvehuIlmCIM17WtYPpDbsJA7DFG0is+jUJfQioA7AnB/Og7JufdGV6912GFS0HBrpx+dQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "peerDependencies": {
         "webidl2": "^24.5.0"
       }
@@ -1231,7 +1227,6 @@
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
       "integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
       "dev": true,
-      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -1636,7 +1631,6 @@
       "integrity": "sha512-dKYCMuPO1bmrpuogcjQ8z7ICCH3FP6WmxpwC03yjzGfZhj9fTJg6+bS1+UAplekbN2C+M61UNllGOOoAfGCrdQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@octokit/auth-token": "^4.0.0",
         "@octokit/graphql": "^7.1.0",
@@ -1934,7 +1928,6 @@
       "integrity": "sha512-iy2GE3MHrYTL5lrCtMZ0X1KLEKKUjmK0kzwcnefhR66txcEmXZD2YWgR5GNdcEwkNx3a0siYkSvl0vIC+Svjmg==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.8.0",
         "@eslint-community/regexpp": "^4.12.1",
@@ -1995,7 +1988,6 @@
       "integrity": "sha512-82GZUjRS0p/jganf6q1rEO25VSoHH0hKPCTrgillPjdI/3bgBhAE1QzHrHTizjpRvy6pGAvKjDJtk2pF9NDq8w==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "bin": {
         "eslint-config-prettier": "bin/cli.js"
       },
@@ -3053,7 +3045,8 @@
       "resolved": "https://registry.npmjs.org/mdn-data/-/mdn-data-2.12.2.tgz",
       "integrity": "sha512-IEn+pegP1aManZuckezWCO+XZQDplx1366JoVhTpMpBB1sPey/SbveZQUosKiKiGYjg1wH4pMlNgXbCiYgihQA==",
       "dev": true,
-      "license": "CC0-1.0"
+      "license": "CC0-1.0",
+      "peer": true
     },
     "node_modules/memfs-or-file-map-to-github-branch": {
       "version": "1.3.0",
@@ -3434,7 +3427,6 @@
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.6.2.tgz",
       "integrity": "sha512-I7AIg5boAr5R0FFtJ6rCfD+LFsWHp81dolrFD8S79U9tb8Az2nGrJncnMSnys+bpQJfRUzqs9hnA81OAA3hCuQ==",
       "dev": true,
-      "peer": true,
       "bin": {
         "prettier": "bin/prettier.cjs"
       },
@@ -3742,6 +3734,7 @@
       "integrity": "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==",
       "dev": true,
       "license": "BSD-3-Clause",
+      "peer": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -3984,7 +3977,6 @@
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -4072,7 +4064,6 @@
       "integrity": "sha512-fxOigKkIem1iAgQ9t4cFOP+kWEA8y6Be/uh50FpJh0FijoeeT/VMrOyJzNLUgjy0rGMEcHeReKDCqj0g9dIe9A==",
       "dev": true,
       "license": "W3C",
-      "peer": true,
       "engines": {
         "node": ">= 18"
       }
diff --git a/src/build/helpers.ts b/src/build/helpers.ts
index 19272793a..da84f2d91 100644
--- a/src/build/helpers.ts
+++ b/src/build/helpers.ts
@@ -56,6 +56,7 @@ const sameTypes = new Set([
   "PromiseLike",
   "undefined",
   "void",
+  "bigint",
 ]);
 export const baseTypeConversionMap = new Map<string, string>([
   ...[...bufferSourceTypes].map((type) => [type, type] as const),
diff --git a/src/build/patches.ts b/src/build/patches.ts
index 28da6377f..77c455515 100644
--- a/src/build/patches.ts
+++ b/src/build/patches.ts
@@ -298,6 +298,11 @@ function handleDictionary(child: Node): DeepPartial<Dictionary> {
   return {
     name,
     members: { member },
+    ...optionalMember(
+      "legacyNamespace",
+      "string",
+      child.properties?.legacyNamespace,
+    ),
   };
 }
 
@@ -311,6 +316,7 @@ function handleMember(c: Node): Partial<Member> {
     name,
     ...optionalMember("type", "string", c.properties?.type),
     ...optionalMember("required", "boolean", c.properties?.required),
+    ...optionalMember("overrideType", "string", c.properties?.overrideType),
   };
 }