diff --git a/packages/argon2/__test__/argon2.spec.ts b/packages/argon2/__test__/argon2.spec.ts
index fed6a5e7..ed4a691c 100644
--- a/packages/argon2/__test__/argon2.spec.ts
+++ b/packages/argon2/__test__/argon2.spec.ts
@@ -2,7 +2,7 @@ import { randomBytes } from 'crypto'
 
 import test from 'ava'
 
-import { Algorithm, hash, verify, Version } from '../index.js'
+import { Algorithm, hash, hashRaw, verify, Version } from '../index.js'
 
 const passwordString = 'some_string123'
 const passwordBuffer = Buffer.from(passwordString)
@@ -43,6 +43,16 @@ test('should be able to hash string', async (t) => {
   )
 })
 
+test('should be able to hashRaw string with a defined salt', async (t) => {
+  await t.notThrowsAsync(() => hash('whatever'))
+  await t.notThrowsAsync(() =>
+    hashRaw('whatever', {
+      secret: randomBytes(32),
+      salt: randomBytes(32),
+    }),
+  )
+})
+
 test('should be able to verify hashed string', async (t) => {
   const PASSWORD = 'Argon2_is_the_best_algorithm_ever'
   t.true(await verify(await hash(PASSWORD), PASSWORD))
@@ -88,7 +98,7 @@ test('should return memoryCost error', async (t) => {
     }),
   )
 
-  t.is(error.message, 'memory cost is too small')
+  t.is(error?.message, 'memory cost is too small')
 })
 
 test('should return timeCost error', async (t) => {
@@ -98,7 +108,7 @@ test('should return timeCost error', async (t) => {
     }),
   )
 
-  t.is(error.message, 'time cost is too small')
+  t.is(error?.message, 'time cost is too small')
 })
 
 test('should return parallelism error', async (t) => {
@@ -109,5 +119,5 @@ test('should return parallelism error', async (t) => {
     }),
   )
 
-  t.is(error.message, 'not enough threads')
+  t.is(error?.message, 'not enough threads')
 })
diff --git a/packages/argon2/index.d.ts b/packages/argon2/index.d.ts
index 749497b8..8f5704e4 100644
--- a/packages/argon2/index.d.ts
+++ b/packages/argon2/index.d.ts
@@ -64,6 +64,7 @@ export interface Options {
   algorithm?: Algorithm
   version?: Version
   secret?: Buffer
+  salt?: Buffer
 }
 export function hash(
   password: string | Buffer,
diff --git a/packages/argon2/src/lib.rs b/packages/argon2/src/lib.rs
index 66d8442c..9773e21b 100644
--- a/packages/argon2/src/lib.rs
+++ b/packages/argon2/src/lib.rs
@@ -89,6 +89,7 @@ pub struct Options {
   pub algorithm: Option<Algorithm>,
   pub version: Option<Version>,
   pub secret: Option<Buffer>,
+  pub salt: Option<Buffer>,
 }
 
 impl Options {
@@ -122,6 +123,7 @@ impl Task for HashTask {
 
   fn compute(&mut self) -> Result<Self::Output> {
     let salt = SaltString::generate(&mut OsRng);
+
     let hasher = self.options.to_argon();
     hasher
       .map_err(|err| Error::new(Status::InvalidArg, format!("{err}")))?
@@ -181,7 +183,6 @@ impl Task for RawHashTask {
   type JsValue = Buffer;
 
   fn compute(&mut self) -> Result<Self::Output> {
-    let salt = SaltString::generate(&mut OsRng);
     let hasher = self
       .options
       .to_argon()
@@ -192,10 +193,19 @@ impl Task for RawHashTask {
       .unwrap_or(Params::DEFAULT_OUTPUT_LEN);
     let mut output = vec![0; output_len];
 
-    hasher
-      .hash_password_into(self.password.as_slice(), salt.as_bytes(), &mut output)
-      .map_err(|err| Error::new(Status::GenericFailure, format!("{err}")))
-      .map(|_| output)
+    match &self.options.salt {
+      Some(buf) => hasher.hash_password_into(self.password.as_slice(), buf.as_ref(), &mut output),
+      None => {
+        let generated_salt = SaltString::generate(&mut OsRng);
+        hasher.hash_password_into(
+          self.password.as_slice(),
+          generated_salt.as_bytes(),
+          &mut output,
+        )
+      }
+    }
+    .map_err(|err| Error::new(Status::GenericFailure, format!("{err}")))
+    .map(|_| output)
   }
 
   fn resolve(&mut self, _env: Env, output: Self::Output) -> Result<Self::JsValue> {