diff --git a/SWSCloudAPI/Utils/decorators.py b/SWSCloudAPI/Utils/decorators.py
index 344a9b0..4162224 100644
--- a/SWSCloudAPI/Utils/decorators.py
+++ b/SWSCloudAPI/Utils/decorators.py
@@ -14,7 +14,7 @@ def login_required(f):
         if not validators.email(request.json.get('email')):
             return jsonify(status='error', message='invalid email format')
         # verify email/password
-        if not Users.auth(request.json.get('email'), request.json.get('password')):
+        if not Users.auth(request.json.get('email'), request.json.get('password').encode()):
             return jsonify(status='error', message='invalid auth')
         #
         return f(*args, **kwargs)
diff --git a/SWSCloudCore/controllers/users/__init__.py b/SWSCloudCore/controllers/users/__init__.py
index 4effd6b..44d717a 100644
--- a/SWSCloudCore/controllers/users/__init__.py
+++ b/SWSCloudCore/controllers/users/__init__.py
@@ -36,7 +36,7 @@ class ControllerUsers:
     def update(self, user_id, **kwargs):
         if 'password' in kwargs:
             x = models.Users.update(
-                password=md5(kwargs['password']).hexdigest()
+                password=md5(kwargs['password'].encode()).hexdigest()
             ).where(
                 models.Users.id == user_id
             )
@@ -69,7 +69,7 @@ class ControllerUsers:
         :param password:
         :return:
         """
-        password_hash = md5(password).hexdigest()
+        password_hash = md5(password.encode()).hexdigest()
         result = models.Users.select().where(
             models.Users.email == email,
             models.Users.password == password_hash,
@@ -86,7 +86,7 @@ class ControllerUsers:
         :param password:
         :return:
         """
-        password_hash = md5(password).hexdigest()
+        password_hash = md5(password.encode()).hexdigest()
         user_id = uuid.uuid4()
         # TODO: add date registration and update of date - =datetime.datetime.now()
         user = models.Users.create(id=user_id, email=email, password=password_hash, status=1)
@@ -95,7 +95,7 @@ class ControllerUsers:
         return False
 
     def password_update(self, user_id, password):
-        password_hash = md5(password).hexdigest()
+        password_hash = md5(password.encode()).hexdigest()
         u = models.Users.get(models.Users.id == user_id)
         u.password = password_hash
         u.save()
diff --git a/SWSCloudWeb/common.py b/SWSCloudWeb/common.py
index d42f058..d6364a5 100644
--- a/SWSCloudWeb/common.py
+++ b/SWSCloudWeb/common.py
@@ -16,7 +16,7 @@ def requires_login(f):
             else:
                 return redirect(url_for("account.logout"))
 
-        if not Users.auth(session.get('email'), session.get('password'), 1):
+        if not Users.auth(session.get('email'), session.get('password').encode(), 1):
             return redirect(url_for("account.logout"))
 
         return f(*args, **kwargs)