diff --git a/crates/backend/src/typegen.rs b/crates/backend/src/typegen.rs
index 814cfcd8..43d395c3 100644
--- a/crates/backend/src/typegen.rs
+++ b/crates/backend/src/typegen.rs
@@ -30,7 +30,9 @@ pub trait ToTypeDef {
 static KNOWN_TYPES: Lazy<HashMap<&'static str, &'static str>> = Lazy::new(|| {
   let mut map = HashMap::default();
   map.extend([
+    ("JsUndefined", "undefined"),
     ("()", "undefined"),
+    ("JsNumber", "number"),
     ("i8", "number"),
     ("i16", "number"),
     ("i32", "number"),
@@ -47,12 +49,15 @@ static KNOWN_TYPES: Lazy<HashMap<&'static str, &'static str>> = Lazy::new(|| {
     ("isize", "BigInt"),
     ("JsBigInt", "BigInt"),
     ("BigInt", "BigInt"),
+    ("JsBoolean", "boolean"),
     ("bool", "boolean"),
+    ("JsString", "string"),
     ("String", "string"),
     ("str", "string"),
     ("Latin1String", "string"),
     ("Utf16String", "string"),
     ("char", "string"),
+    ("JsObject", "object"),
     ("Object", "object"),
     ("Value", "any"),
     ("Map", "Record<string, any>"),
@@ -71,7 +76,8 @@ static KNOWN_TYPES: Lazy<HashMap<&'static str, &'static str>> = Lazy::new(|| {
     ("Either5", "{} | {} | {} | {} | {}"),
     ("unknown", "unknown"),
     ("null", "null"),
-    ("symbol", "symbol"),
+    ("Symbol", "symbol"),
+    ("JsSymbol", "symbol"),
     ("external", "object"),
     ("AbortSignal", "AbortSignal"),
     ("JsFunction", "(...args: any[]) => any"),
diff --git a/crates/napi/src/bindgen_runtime/js_values.rs b/crates/napi/src/bindgen_runtime/js_values.rs
index ec880d07..65cd6ebc 100644
--- a/crates/napi/src/bindgen_runtime/js_values.rs
+++ b/crates/napi/src/bindgen_runtime/js_values.rs
@@ -17,6 +17,7 @@ mod promise;
 #[cfg(feature = "serde-json")]
 mod serde;
 mod string;
+mod symbol;
 mod task;
 
 pub use array::*;
@@ -30,6 +31,7 @@ pub use nil::*;
 pub use object::*;
 pub use promise::*;
 pub use string::*;
+pub use symbol::*;
 pub use task::*;
 
 #[cfg(feature = "latin1")]
diff --git a/crates/napi/src/bindgen_runtime/js_values/symbol.rs b/crates/napi/src/bindgen_runtime/js_values/symbol.rs
new file mode 100644
index 00000000..51a7ff40
--- /dev/null
+++ b/crates/napi/src/bindgen_runtime/js_values/symbol.rs
@@ -0,0 +1,48 @@
+use std::{ffi::CString, ptr};
+
+use crate::check_status;
+
+use super::ToNapiValue;
+
+pub struct Symbol {
+  desc: Option<String>,
+}
+
+impl Symbol {
+  pub fn new(desc: String) -> Self {
+    Self { desc: Some(desc) }
+  }
+
+  pub fn identity() -> Self {
+    Self { desc: None }
+  }
+}
+
+impl ToNapiValue for Symbol {
+  unsafe fn to_napi_value(
+    env: napi_sys::napi_env,
+    val: Self,
+  ) -> crate::Result<napi_sys::napi_value> {
+    let mut symbol_value = ptr::null_mut();
+    check_status!(napi_sys::napi_create_symbol(
+      env,
+      match val.desc {
+        Some(desc) => {
+          let mut desc_string = ptr::null_mut();
+          let desc_len = desc.len();
+          let desc_c_string = CString::new(desc)?;
+          check_status!(napi_sys::napi_create_string_utf8(
+            env,
+            desc_c_string.as_ptr(),
+            desc_len,
+            &mut desc_string
+          ))?;
+          desc_string
+        }
+        None => ptr::null_mut(),
+      },
+      &mut symbol_value
+    ))?;
+    Ok(symbol_value)
+  }
+}
diff --git a/crates/napi/src/js_values/mod.rs b/crates/napi/src/js_values/mod.rs
index 87892a1a..1fd72bc2 100644
--- a/crates/napi/src/js_values/mod.rs
+++ b/crates/napi/src/js_values/mod.rs
@@ -260,12 +260,13 @@ macro_rules! impl_js_value_methods {
 macro_rules! impl_object_methods {
   ($js_value:ident) => {
     impl $js_value {
-      pub fn set_property<V>(&mut self, key: JsString, value: V) -> Result<()>
+      pub fn set_property<K, V>(&mut self, key: K, value: V) -> Result<()>
       where
+        K: NapiRaw,
         V: NapiRaw,
       {
         check_status!(unsafe {
-          sys::napi_set_property(self.0.env, self.0.value, key.0.value, value.raw())
+          sys::napi_set_property(self.0.env, self.0.value, key.raw(), value.raw())
         })
       }
 
diff --git a/examples/napi/__test__/typegen.spec.ts.md b/examples/napi/__test__/typegen.spec.ts.md
index df52895a..0f6c3615 100644
--- a/examples/napi/__test__/typegen.spec.ts.md
+++ b/examples/napi/__test__/typegen.spec.ts.md
@@ -35,7 +35,7 @@ Generated by [AVA](https://avajs.dev).
     export function listObjKeys(obj: object): Array<string>␊
     export function createObj(): object␊
     export function getGlobal(): typeof global␊
-    export function getUndefined(): JsUndefined␊
+    export function getUndefined(): void␊
     export function getNull(): JsNull␊
     export function asyncPlus100(p: Promise<number>): Promise<number>␊
     interface PackageJson {␊
@@ -50,6 +50,8 @@ Generated by [AVA](https://avajs.dev).
     export function concatStr(s: string): string␊
     export function concatUtf16(s: string): string␊
     export function concatLatin1(s: string): string␊
+    export function setSymbolInObj(symbol: symbol): object␊
+    export function createSymbol(): symbol␊
     export function withoutAbortController(a: number, b: number): Promise<number>␊
     export function withAbortController(a: number, b: number, signal: AbortSignal): Promise<number>␊
     export function callThreadsafeFunction(callback: (...args: any[]) => any): void␊
diff --git a/examples/napi/__test__/typegen.spec.ts.snap b/examples/napi/__test__/typegen.spec.ts.snap
index a8561624..cc8aa757 100644
Binary files a/examples/napi/__test__/typegen.spec.ts.snap and b/examples/napi/__test__/typegen.spec.ts.snap differ
diff --git a/examples/napi/__test__/values.spec.ts b/examples/napi/__test__/values.spec.ts
index fd818df4..f5cb81fc 100644
--- a/examples/napi/__test__/values.spec.ts
+++ b/examples/napi/__test__/values.spec.ts
@@ -44,6 +44,8 @@ import {
   getGlobal,
   getUndefined,
   getNull,
+  setSymbolInObj,
+  createSymbol,
 } from '../'
 
 test('number', (t) => {
@@ -156,6 +158,16 @@ test('get null', (t) => {
   }
 })
 
+test('pass symbol in', (t) => {
+  const sym = Symbol('test')
+  const obj = setSymbolInObj(sym)
+  t.is(obj[sym], 'a symbol')
+})
+
+test('create symbol', (t) => {
+  t.is(createSymbol().toString(), 'Symbol(a symbol)')
+})
+
 test('Option', (t) => {
   t.is(mapOption(null), null)
   t.is(mapOption(3), 4)
diff --git a/examples/napi/index.d.ts b/examples/napi/index.d.ts
index d850dddf..229af9ce 100644
--- a/examples/napi/index.d.ts
+++ b/examples/napi/index.d.ts
@@ -7,9 +7,7 @@ export function bigintAdd(a: BigInt, b: BigInt): BigInt
 export function createBigInt(): BigInt
 export function createBigIntI64(): BigInt
 export function getCwd(callback: (arg0: string) => void): void
-export function readFile(
-  callback: (arg0: Error | undefined, arg1: string | null) => void,
-): void
+export function readFile(callback: (arg0: Error | undefined, arg1: string | null) => void): void
 export function eitherStringOrNumber(input: string | number): number
 export function returnEither(input: number): string | number
 export function either3(input: string | number | boolean): number
@@ -17,21 +15,8 @@ interface Obj {
   v: string | number
 }
 export function either4(input: string | number | boolean | Obj): number
-export enum Kind {
-  Dog = 0,
-  Cat = 1,
-  Duck = 2,
-}
-export enum CustomNumEnum {
-  One = 1,
-  Two = 2,
-  Three = 3,
-  Four = 4,
-  Six = 6,
-  Eight = 8,
-  Nine = 9,
-  Ten = 10,
-}
+export enum Kind { Dog = 0, Cat = 1, Duck = 2 }
+export enum CustomNumEnum { One = 1, Two = 2, Three = 3, Four = 4, Six = 6, Eight = 8, Nine = 9, Ten = 10 }
 export function enumToI32(e: CustomNumEnum): number
 export function throwError(): void
 export function mapOption(val: number | null): number | null
@@ -40,7 +25,7 @@ export function fibonacci(n: number): number
 export function listObjKeys(obj: object): Array<string>
 export function createObj(): object
 export function getGlobal(): typeof global
-export function getUndefined(): JsUndefined
+export function getUndefined(): void
 export function getNull(): JsNull
 export function asyncPlus100(p: Promise<number>): Promise<number>
 interface PackageJson {
@@ -55,12 +40,10 @@ export function contains(source: string, target: string): boolean
 export function concatStr(s: string): string
 export function concatUtf16(s: string): string
 export function concatLatin1(s: string): string
+export function setSymbolInObj(symbol: symbol): object
+export function createSymbol(): symbol
 export function withoutAbortController(a: number, b: number): Promise<number>
-export function withAbortController(
-  a: number,
-  b: number,
-  signal: AbortSignal,
-): Promise<number>
+export function withAbortController(a: number, b: number, signal: AbortSignal): Promise<number>
 export function callThreadsafeFunction(callback: (...args: any[]) => any): void
 export function threadsafeFunctionThrowError(cb: (...args: any[]) => any): void
 export function getBuffer(): Buffer
@@ -74,10 +57,14 @@ export class Animal {
   static getDogKind(): Kind
 }
 export class Blake2BHasher {
+  
   static withKey(key: Blake2bKey): Blake2BHasher
 }
-export class Blake2BKey {}
+export class Blake2BKey {
+  
+}
 export class Context {
+  
   constructor()
   static withData(data: string): Context
   method(): string
diff --git a/examples/napi/src/lib.rs b/examples/napi/src/lib.rs
index 8c75aa37..bbd3e620 100644
--- a/examples/napi/src/lib.rs
+++ b/examples/napi/src/lib.rs
@@ -18,6 +18,7 @@ mod object;
 mod promise;
 mod serde;
 mod string;
+mod symbol;
 mod task;
 mod threadsafe_function;
 mod typed_array;
diff --git a/examples/napi/src/symbol.rs b/examples/napi/src/symbol.rs
new file mode 100644
index 00000000..cc52be68
--- /dev/null
+++ b/examples/napi/src/symbol.rs
@@ -0,0 +1,13 @@
+use napi::{bindgen_prelude::*, Env, JsObject, JsSymbol};
+
+#[napi]
+pub fn set_symbol_in_obj(env: Env, symbol: JsSymbol) -> Result<JsObject> {
+  let mut obj = env.create_object()?;
+  obj.set_property(symbol, env.create_string("a symbol")?)?;
+  Ok(obj)
+}
+
+#[napi]
+pub fn create_symbol() -> Symbol {
+  Symbol::new("a symbol".to_owned())
+}