diff --git a/src/argon2.rs b/src/argon2.rs
index 8001d61..4ad878a 100644
--- a/src/argon2.rs
+++ b/src/argon2.rs
@@ -1,6 +1,5 @@
 use std::{
-    ffi::{c_char, CStr, CString},
-    slice, thread,
+    ffi::{c_char, CStr, CString}, slice, sync::mpsc, thread
 };
 
 extern crate rayon;
@@ -75,6 +74,48 @@ fn argon2_verify_fail_test() {
     assert_eq!(false, is_valid);
 }
 
+#[no_mangle]
+pub extern "C" fn argon2_verify_threadpool(hashed_pass: *const c_char, password: *const c_char) -> bool {
+    let hashed_pass_string = unsafe {
+        assert!(!hashed_pass.is_null());
+        CStr::from_ptr(hashed_pass)
+    }
+    .to_str()
+    .unwrap();
+
+    let password_string = unsafe {
+        assert!(!password.is_null());
+        CStr::from_ptr(password)
+    }
+    .to_str()
+    .unwrap()
+    .as_bytes();
+    let (sender, receiver) = mpsc::channel();
+    rayon::spawn(move || {
+        let parsed_hash = PasswordHash::new(&hashed_pass_string).unwrap();
+        let thread_result = Argon2::default()
+            .verify_password(password_string, &parsed_hash)
+            .is_ok();
+        sender.send(thread_result);
+    });
+    let result = receiver.recv().unwrap();
+    result
+}
+
+#[test]
+fn argon2_verify_threadpool_test() {
+    let password = "PasswordToVerify";
+    let password_cstr = CString::new(password).unwrap();
+    let password_bytes = password_cstr.as_bytes_with_nul();
+    let password_ptr = password_bytes.as_ptr() as *const i8;
+    let hashed_password = argon2_hash_threadpool(password_ptr);
+    let hashed_password_ctr = unsafe { CString::from_raw(hashed_password) };
+    let hashed_password_bytes = hashed_password_ctr.as_bytes_with_nul();
+    let hashed_password_ptr = hashed_password_bytes.as_ptr() as *const i8;
+    let is_valid = argon2_verify_threadpool(hashed_password_ptr, password_ptr);
+    assert_eq!(true, is_valid);
+}
+
 #[no_mangle]
 pub extern "C" fn argon2_verify_thread(
     hashed_pass: *const c_char,
@@ -148,6 +189,38 @@ fn argon2_hash_test() {
     assert_ne!(password, hashed_password_str);
 }
 
+#[no_mangle]
+pub extern "C" fn argon2_hash_threadpool(pass_to_hash: *const c_char) -> *mut c_char {
+    let pass_bytes = unsafe {
+        assert!(!pass_to_hash.is_null());
+        CStr::from_ptr(pass_to_hash)
+    }
+    .to_str()
+    .unwrap()
+    .as_bytes();
+    let (sender, receiver) = mpsc::channel();
+    rayon::spawn(move || {
+        let salt = SaltString::generate(&mut OsRng);
+        let argon2 = Argon2::default();
+        let password_hash = argon2.hash_password(pass_bytes, &salt).unwrap().to_string();
+        sender.send(password_hash);
+    });
+    let result = CString::new(receiver.recv().unwrap()).unwrap().into_raw();
+    result
+}
+
+#[test]
+fn argon2_hash_threadpool_test() {
+    let password = "DontUseThisPassword";
+    let password_cstr = CString::new(password).unwrap();
+    let password_bytes = password_cstr.as_bytes_with_nul();
+    let password_ptr = password_bytes.as_ptr() as *const i8;
+    let hashed_password_ptr = argon2_hash_threadpool(password_ptr);
+    let hashed_password_ctr = unsafe { CString::from_raw(hashed_password_ptr) };
+    let hashed_password_str = hashed_password_ctr.to_str().unwrap();
+    assert_ne!(password, hashed_password_str);
+}
+
 #[no_mangle]
 pub extern "C" fn argon2_hash_thread(
     passwords_to_hash: *const *const c_char,
diff --git a/src/bcrypt.rs b/src/bcrypt.rs
index 0dd56ab..def6296 100644
--- a/src/bcrypt.rs
+++ b/src/bcrypt.rs
@@ -1,6 +1,5 @@
 use std::{
-    ffi::{c_char, CStr, CString},
-    thread,
+    ffi::{c_char, CStr, CString}, sync::mpsc, thread
 };
 
 use bcrypt::{hash, verify, DEFAULT_COST};
@@ -31,6 +30,36 @@ fn bcrypt_hash_test() {
     assert_ne!(hashed_password_str, password);
 }
 
+#[no_mangle]
+pub extern "C" fn bcrypt_hash_threadpool(pass_to_hash: *const c_char) -> *mut c_char {
+    let string_pass = unsafe {
+        assert!(!pass_to_hash.is_null());
+
+        CStr::from_ptr(pass_to_hash)
+    }
+    .to_str()
+    .unwrap();
+    let (sender, receiver) = mpsc::channel();
+    rayon::spawn(move || {
+        let hashed_password = hash(string_pass, DEFAULT_COST).unwrap();
+        sender.send(hashed_password);
+    });
+    let result = CString::new(receiver.recv().unwrap()).unwrap().into_raw();
+    result
+}
+
+#[test]
+fn bcrypt_hash_threadpool_test() {
+    let password = "PasswordToHash";
+    let password_cstr = CString::new(password).unwrap();
+    let password_bytes = password_cstr.as_bytes_with_nul();
+    let passsword_ptr = password_bytes.as_ptr() as *const i8;
+    let hashed_password = bcrypt_hash_threadpool(passsword_ptr);
+    let hashed_password_ctr = unsafe { CString::from_raw(hashed_password) };
+    let hashed_password_str = hashed_password_ctr.to_str().unwrap();
+    assert_ne!(hashed_password_str, password);
+}
+
 #[no_mangle]
 pub extern "C" fn bcrypt_verify(pass: *const c_char, hash: *const c_char) -> bool {
     let string_pass = unsafe {
@@ -51,8 +80,22 @@ pub extern "C" fn bcrypt_verify(pass: *const c_char, hash: *const c_char) -> boo
     return verify(string_pass, string_hash).unwrap();
 }
 
+#[test]
+fn bcrypt_verify_test() {
+    let password = "PasswordToHash";
+    let password_cstr = CString::new(password).unwrap();
+    let password_bytes = password_cstr.as_bytes_with_nul();
+    let password_ptr = password_bytes.as_ptr() as *const i8;
+    let hashed_password = bcrypt_hash(password_ptr);
+    let hashed_password_ctr = unsafe { CString::from_raw(hashed_password) };
+    let hashed_password_bytes = hashed_password_ctr.as_bytes_with_nul();
+    let hashed_password_ptr = hashed_password_bytes.as_ptr() as *const i8;
+    let is_valid = bcrypt_verify(password_ptr, hashed_password_ptr);
+    assert_eq!(true, is_valid);
+}
+
 #[no_mangle]
-pub extern "C" fn bcrypt_verify_thread(pass: *const c_char, hash: *const c_char) -> bool {
+pub extern "C" fn bcrypt_verify_threadpool(pass: *const c_char, hash: *const c_char) -> bool {
     let string_pass = unsafe {
         assert!(!pass.is_null());
 
@@ -68,21 +111,25 @@ pub extern "C" fn bcrypt_verify_thread(pass: *const c_char, hash: *const c_char)
     }
     .to_str()
     .unwrap();
-    return thread::spawn(move || return verify(string_pass, string_hash).unwrap())
-        .join()
-        .unwrap();
+    let (sender, receiver) = mpsc::channel();
+    rayon::spawn(move || {
+        let thread_result = verify(string_pass, string_hash).unwrap();
+        sender.send(thread_result);
+    });
+    let result = receiver.recv().unwrap();
+    result
 }
 
 #[test]
-fn bcrypt_verify_test() {
+fn bcrypt_verify_threadpool_test() {
     let password = "PasswordToHash";
     let password_cstr = CString::new(password).unwrap();
     let password_bytes = password_cstr.as_bytes_with_nul();
     let password_ptr = password_bytes.as_ptr() as *const i8;
-    let hashed_password = bcrypt_hash(password_ptr);
+    let hashed_password = bcrypt_hash_threadpool(password_ptr);
     let hashed_password_ctr = unsafe { CString::from_raw(hashed_password) };
     let hashed_password_bytes = hashed_password_ctr.as_bytes_with_nul();
     let hashed_password_ptr = hashed_password_bytes.as_ptr() as *const i8;
-    let is_valid = bcrypt_verify(password_ptr, hashed_password_ptr);
+    let is_valid = bcrypt_verify_threadpool(password_ptr, hashed_password_ptr);
     assert_eq!(true, is_valid);
-}
+}
\ No newline at end of file
diff --git a/src/scrypt.rs b/src/scrypt.rs
index 81fc18e..a0cd509 100644
--- a/src/scrypt.rs
+++ b/src/scrypt.rs
@@ -1,4 +1,4 @@
-use std::ffi::{c_char, CStr, CString};
+use std::{ffi::{c_char, CStr, CString},  sync::mpsc};
 
 use scrypt::{
     password_hash::{rand_core::OsRng, PasswordHash, PasswordHasher, PasswordVerifier, SaltString},
@@ -35,6 +35,40 @@ fn scrypt_hash_test() {
     assert_ne!(hashed_str, password);
 }
 
+#[no_mangle]
+pub extern "C" fn scrypt_hash_threadpool(pass_to_hash: *const c_char) -> *mut c_char {
+    let string_pass = unsafe {
+        assert!(!pass_to_hash.is_null());
+
+        CStr::from_ptr(pass_to_hash)
+    }
+    .to_str()
+    .unwrap();
+    let (sender, receiver) = mpsc::channel();
+    rayon::spawn(move || {
+        let salt = SaltString::generate(&mut OsRng);
+        let hashed = Scrypt
+            .hash_password(string_pass.as_bytes(), &salt)
+            .unwrap()
+            .to_string();
+        sender.send(hashed);
+    });
+    let result = CString::new(receiver.recv().unwrap()).unwrap().into_raw();
+    result
+}
+
+#[test]
+fn scrypt_hash_threadpool_test() {
+    let password = "PasswordToTest";
+    let password_cstr = CString::new(password).unwrap();
+    let password_bytes = password_cstr.as_bytes_with_nul();
+    let password_ptr = password_bytes.as_ptr() as *const i8;
+    let hashed = scrypt_hash_threadpool(password_ptr);
+    let hashed_ctr = unsafe { CString::from_raw(hashed) };
+    let hashed_str = hashed_ctr.to_str().unwrap();
+    assert_ne!(hashed_str, password);
+}
+
 #[no_mangle]
 pub extern "C" fn scrypt_verify(
     pass_to_check: *const c_char,
@@ -75,3 +109,49 @@ fn scrypt_verify_test() {
     let is_valid = scrypt_verify(password_ptr, hashed_ptr);
     assert_eq!(true, is_valid);
 }
+
+#[no_mangle]
+pub extern "C" fn scrypt_verify_threadpool(
+    pass_to_check: *const c_char,
+    hash_to_check: *const c_char,
+) -> bool {
+    let string_pass = unsafe {
+        assert!(!pass_to_check.is_null());
+
+        CStr::from_ptr(pass_to_check)
+    }
+    .to_str()
+    .unwrap();
+
+    let string_hash = unsafe {
+        assert!(!hash_to_check.is_null());
+
+        CStr::from_ptr(hash_to_check)
+    }
+    .to_str()
+    .unwrap();
+    let (sender, receiver) = mpsc::channel();
+    rayon::spawn(move || {
+        let parsed_hash = PasswordHash::new(&string_hash).unwrap();
+        let thread_result = Scrypt
+            .verify_password(string_pass.as_bytes(), &parsed_hash)
+            .is_ok();
+        sender.send(thread_result);
+    });
+    let result = receiver.recv().unwrap();
+    result
+}
+
+#[test]
+fn scrypt_verify_threadpool_test() {
+    let password = "NotThePasswordYouAreLookingFor";
+    let password_cstr = CString::new(password).unwrap();
+    let password_bytes = password_cstr.as_bytes_with_nul();
+    let password_ptr = password_bytes.as_ptr() as *const i8;
+    let hash = scrypt_hash_threadpool(password_ptr);
+    let hash_ctr = unsafe { CString::from_raw(hash) };
+    let hashed_bytes = hash_ctr.as_bytes_with_nul();
+    let hashed_ptr = hashed_bytes.as_ptr() as *const i8;
+    let is_valid = scrypt_verify_threadpool(password_ptr, hashed_ptr);
+    assert_eq!(true, is_valid);
+}
\ No newline at end of file