diff --git a/Cargo.toml b/Cargo.toml
index c2766d02..628c3fd5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,9 +11,7 @@ members = [
   "./memory-testing",
 ]
 
-exclude = [
-  "./testing"
-]
+exclude = ["./testing"]
 
 [profile.release]
 lto = true
diff --git a/bench/Cargo.toml b/bench/Cargo.toml
index dd41b348..e9f825a1 100644
--- a/bench/Cargo.toml
+++ b/bench/Cargo.toml
@@ -9,13 +9,17 @@ version = "0.1.0"
 crate-type = ["cdylib"]
 
 [dependencies]
-napi = {path = "../crates/napi", features = ["tokio_rt", "serde-json", "compat-mode"]}
-napi-derive = {path = "../crates/macro", features = ["compat-mode"]}
+napi = { path = "../crates/napi", features = [
+  "tokio_rt",
+  "serde-json",
+  "compat-mode",
+] }
+napi-derive = { path = "../crates/macro", features = ["compat-mode"] }
 serde = "1"
 serde_json = "1"
 
 [target.'cfg(all(target_arch = "x86_64", not(target_env = "musl")))'.dependencies]
-mimalloc = {version = "0.1"}
+mimalloc = { version = "0.1" }
 
 [build-dependencies]
-napi-build = {path = "../crates/build"}
+napi-build = { path = "../crates/build" }
diff --git a/cli/CHANGELOG.md b/cli/CHANGELOG.md
index 6ca120ff..a8d6b156 100644
--- a/cli/CHANGELOG.md
+++ b/cli/CHANGELOG.md
@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [2.4.4](https://github.com/napi-rs/napi-rs/compare/@napi-rs/cli@2.4.3...@napi-rs/cli@2.4.4) (2022-02-11)
+
+### Bug Fixes
+
+- **cli:** generate ExternalObject type on demand ([f9c618e](https://github.com/napi-rs/napi-rs/commit/f9c618e0462c3f75593b0a980f4babcb265ffc0c))
+
 ## [2.4.3](https://github.com/napi-rs/napi-rs/compare/@napi-rs/cli@2.4.2...@napi-rs/cli@2.4.3) (2022-02-09)
 
 ### Bug Fixes
diff --git a/cli/package.json b/cli/package.json
index c6c458de..3092bbdf 100644
--- a/cli/package.json
+++ b/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@napi-rs/cli",
-  "version": "2.4.3",
+  "version": "2.4.4",
   "description": "Cli tools for napi-rs",
   "keywords": [
     "cli",
diff --git a/cli/src/build.ts b/cli/src/build.ts
index fba5c764..da665e23 100644
--- a/cli/src/build.ts
+++ b/cli/src/build.ts
@@ -493,18 +493,6 @@ async function processIntermediateTypeFile(
     return idents
   }
 
-  const dtsHeader = `/* tslint:disable */
-/* eslint-disable */
-
-/* auto-generated by NAPI-RS */
-
-export class ExternalObject<T> {
-  readonly '': {
-    readonly '': unique symbol
-    [K: symbol]: T
-  }
-}\n`
-
   const allDefs = lines.map((line) => JSON.parse(line) as TypeDef)
 
   function convertDefs(defs: TypeDef[], nested = false): string {
@@ -597,8 +585,29 @@ export class ExternalObject<T> {
     return acc + `export namespace ${mod} {\n${convertDefs(defs, true)}}\n`
   }, '')
 
+  const dtsHeader = `/* tslint:disable */
+/* eslint-disable */
+
+/* auto-generated by NAPI-RS */\n
+`
+
+  const externalDef =
+    topLevelDef.indexOf('ExternalObject<') > -1 ||
+    namespaceDefs.indexOf('ExternalObject<') > -1
+      ? `export class ExternalObject<T> {
+  readonly '': {
+    readonly '': unique symbol
+    [K: symbol]: T
+  }
+}\n`
+      : ''
+
   await unlinkAsync(source)
-  await writeFileAsync(target, dtsHeader + topLevelDef + namespaceDefs, 'utf8')
+  await writeFileAsync(
+    target,
+    dtsHeader + externalDef + topLevelDef + namespaceDefs,
+    'utf8',
+  )
   return idents
 }
 
diff --git a/crates/backend/Cargo.toml b/crates/backend/Cargo.toml
index f15ea9cd..e0c81010 100644
--- a/crates/backend/Cargo.toml
+++ b/crates/backend/Cargo.toml
@@ -20,7 +20,7 @@ type-def = ["regex", "once_cell"]
 convert_case = "0.5"
 proc-macro2 = "1"
 quote = "1"
-syn = {version = "1", features = ["fold", "full", "extra-traits"]}
+syn = { version = "1", features = ["fold", "full", "extra-traits"] }
 
 [dependencies.regex]
 optional = true
diff --git a/crates/macro/Cargo.toml b/crates/macro/Cargo.toml
index 1a9dc207..dd57c242 100644
--- a/crates/macro/Cargo.toml
+++ b/crates/macro/Cargo.toml
@@ -22,10 +22,10 @@ type-def = ["napi-derive-backend/type-def"]
 
 [dependencies]
 convert_case = "0.5"
-napi-derive-backend = {version = "1.0.25", path = "../backend"}
+napi-derive-backend = { version = "1.0.25", path = "../backend" }
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = {version = "1.0", features = ["fold", "full", "extra-traits"]}
+syn = { version = "1.0", features = ["fold", "full", "extra-traits"] }
 
 [lib]
 proc-macro = true
diff --git a/crates/napi/Cargo.toml b/crates/napi/Cargo.toml
index 7c4e88b8..cf39b7c9 100644
--- a/crates/napi/Cargo.toml
+++ b/crates/napi/Cargo.toml
@@ -73,8 +73,8 @@ optional = true
 version = "1"
 
 [target.'cfg(windows)'.dependencies]
-windows = { version = "0.30", features = [
-    "Win32_System_WindowsProgramming",
-    "Win32_System_LibraryLoader",
-    "Win32_Foundation",
+windows = { version = "0.32", features = [
+  "Win32_System_WindowsProgramming",
+  "Win32_System_LibraryLoader",
+  "Win32_Foundation",
 ] }
diff --git a/examples/napi-compat-mode/Cargo.toml b/examples/napi-compat-mode/Cargo.toml
index 23d790b6..8e483576 100644
--- a/examples/napi-compat-mode/Cargo.toml
+++ b/examples/napi-compat-mode/Cargo.toml
@@ -14,13 +14,18 @@ napi3 = ["napi/napi3"]
 
 [dependencies]
 futures = "0.3"
-napi = {path = "../../crates/napi", features = ["tokio_rt", "serde-json", "latin1", "compat-mode"]}
-napi-derive = {path = "../../crates/macro", features = ["compat-mode"]}
+napi = { path = "../../crates/napi", features = [
+  "tokio_rt",
+  "serde-json",
+  "latin1",
+  "compat-mode",
+] }
+napi-derive = { path = "../../crates/macro", features = ["compat-mode"] }
 serde = "1"
 serde_bytes = "0.11"
 serde_derive = "1"
 serde_json = "1"
-tokio = {version = "1", features = ["default", "fs"]}
+tokio = { version = "1", features = ["default", "fs"] }
 
 [build-dependencies]
-napi-build = {path = "../../crates/build"}
+napi-build = { path = "../../crates/build" }
diff --git a/examples/napi/Cargo.toml b/examples/napi/Cargo.toml
index 242958e8..e059d482 100644
--- a/examples/napi/Cargo.toml
+++ b/examples/napi/Cargo.toml
@@ -12,14 +12,14 @@ crate-type = ["cdylib"]
 chrono = "0.4"
 futures = "0.3"
 napi = { path = "../../crates/napi", default-features = false, features = [
-    "tokio_fs",
-    "napi8",
-    "tokio_rt",
-    "serde-json",
-    "async",
-    "experimental",
-    "latin1",
-    "chrono_date",
+  "tokio_fs",
+  "napi8",
+  "tokio_rt",
+  "serde-json",
+  "async",
+  "experimental",
+  "latin1",
+  "chrono_date",
 ] }
 napi-derive = { path = "../../crates/macro", features = ["type-def"] }
 serde = "1"
diff --git a/examples/napi/__test__/values.spec.ts.md b/examples/napi/__test__/values.spec.ts.md
index 62685277..7c313eb4 100644
--- a/examples/napi/__test__/values.spec.ts.md
+++ b/examples/napi/__test__/values.spec.ts.md
@@ -14,6 +14,7 @@ Generated by [AVA](https://avajs.dev).
       '@rollup/plugin-json',
       '@rollup/plugin-node-resolve',
       '@rollup/plugin-replace',
+      '@taplo/cli',
       '@types/debug',
       '@types/lodash-es',
       '@types/node',
diff --git a/examples/napi/__test__/values.spec.ts.snap b/examples/napi/__test__/values.spec.ts.snap
index 94d498ef..beb82ba0 100644
Binary files a/examples/napi/__test__/values.spec.ts.snap and b/examples/napi/__test__/values.spec.ts.snap differ
diff --git a/memory-testing/Cargo.toml b/memory-testing/Cargo.toml
index 51091dbf..0ad743b1 100644
--- a/memory-testing/Cargo.toml
+++ b/memory-testing/Cargo.toml
@@ -10,13 +10,18 @@ crate-type = ["cdylib"]
 
 [dependencies]
 futures = "0.3"
-napi = {path = "../crates/napi", features = ["tokio_rt", "serde-json", "latin1", "compat-mode"]}
-napi-derive = {path = "../crates/macro", features = ["compat-mode"]}
+napi = { path = "../crates/napi", features = [
+  "tokio_rt",
+  "serde-json",
+  "latin1",
+  "compat-mode",
+] }
+napi-derive = { path = "../crates/macro", features = ["compat-mode"] }
 serde = "1"
 serde_bytes = "0.11"
 serde_derive = "1"
 serde_json = "1"
-tokio = {version = "1", features = ["default", "fs"]}
+tokio = { version = "1", features = ["default", "fs"] }
 
 [build-dependencies]
-napi-build = {path = "../crates/build"}
+napi-build = { path = "../crates/build" }
diff --git a/package.json b/package.json
index bdf8e50d..33eef455 100644
--- a/package.json
+++ b/package.json
@@ -27,9 +27,10 @@
     "build:test:android:armv7": "yarn workspace compat-mode-examples build --target armv7-linux-androideabi && yarn workspace examples build --target armv7-linux-androideabi",
     "build:test:armv7": "yarn workspace compat-mode-examples build-armv7 && yarn workspace examples build-armv7",
     "bundle": "rollup -c rollup.config.js",
-    "format": "run-p format:prettier format:rs",
+    "format": "run-p format:prettier format:rs format:toml",
     "format:prettier": "prettier . -w",
     "format:rs": "cargo fmt",
+    "format:toml": "taplo format",
     "lint": "eslint -c .eslintrc.yml .",
     "prepublishOnly": "npm run build && pinst --disable",
     "test": "ava",
@@ -54,6 +55,12 @@
     ],
     "*.@(js||ts|json|md|yml|yaml)": [
       "prettier --write"
+    ],
+    "*.toml": [
+      "taplo format"
+    ],
+    "*.rs": [
+      "cargo fmt"
     ]
   },
   "husky": {
@@ -67,6 +74,7 @@
     "@rollup/plugin-json": "^4.1.0",
     "@rollup/plugin-node-resolve": "^13.1.3",
     "@rollup/plugin-replace": "^3.0.1",
+    "@taplo/cli": "^0.3.2",
     "@types/debug": "^4.1.7",
     "@types/lodash-es": "^4.17.5",
     "@types/node": "^17.0.10",
diff --git a/yarn.lock b/yarn.lock
index d032a0fd..d190b9af 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1348,6 +1348,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@taplo/cli@npm:^0.3.2":
+  version: 0.3.2
+  resolution: "@taplo/cli@npm:0.3.2"
+  dependencies:
+    fast-glob: ^3.2.4
+    node-fetch: ^2.6.1
+  bin:
+    taplo: dist/cli.js
+  checksum: aa289d561b767ee3730ee431dec8a55bf2b2da5bc8e837156ca8cf39a165ae0e2edf16f669e5a40da2b5c8b67ceea5bb80cd2e91803659b09af707505741992c
+  languageName: node
+  linkType: hard
+
 "@tootallnate/once@npm:1":
   version: 1.1.2
   resolution: "@tootallnate/once@npm:1.1.2"
@@ -3956,7 +3968,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"fast-glob@npm:^3.2.7, fast-glob@npm:^3.2.9":
+"fast-glob@npm:^3.2.4, fast-glob@npm:^3.2.7, fast-glob@npm:^3.2.9":
   version: 3.2.11
   resolution: "fast-glob@npm:3.2.11"
   dependencies:
@@ -6156,6 +6168,7 @@ __metadata:
     "@rollup/plugin-json": ^4.1.0
     "@rollup/plugin-node-resolve": ^13.1.3
     "@rollup/plugin-replace": ^3.0.1
+    "@taplo/cli": ^0.3.2
     "@types/debug": ^4.1.7
     "@types/lodash-es": ^4.17.5
     "@types/node": ^17.0.10