diff --git a/ref-test/app/models/entry.py b/ref-test/app/models/entry.py
index bbbbb81..e9795fd 100644
--- a/ref-test/app/models/entry.py
+++ b/ref-test/app/models/entry.py
@@ -1,5 +1,4 @@
 from ..extensions import db, mail
-from ..tools.forms import JsonEncodedDict
 from ..tools.encryption import decrypt, encrypt
 from ..tools.logs import write
 from .test import Test
@@ -8,6 +7,7 @@ from flask_login import current_user
 from flask_mail import Message
 from smtplib import SMTPException
 from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy_json import MutableJson
 
 from datetime import datetime, timedelta
 from uuid import uuid4
@@ -25,8 +25,8 @@ class Entry(db.Model):
     end_time = db.Column(db.DateTime, nullable=True)
     status = db.Column(db.String(16), nullable=True)
     valid = db.Column(db.Boolean, default=True, nullable=True)
-    answers = db.Column(JsonEncodedDict, nullable=True)
-    result = db.Column(JsonEncodedDict, nullable=True)
+    answers = db.Column(MutableJson, nullable=True)
+    result = db.Column(MutableJson, nullable=True)
     
     def __repr__(self):
         return f'<New entry by {self.first_name} {self.surname}> was added with <id {self.id}>.'
diff --git a/ref-test/app/models/test.py b/ref-test/app/models/test.py
index e2a53fc..8919157 100644
--- a/ref-test/app/models/test.py
+++ b/ref-test/app/models/test.py
@@ -1,9 +1,9 @@
 from ..extensions import db
-from ..tools.forms import JsonEncodedDict
 from ..tools.logs import write
 
 from flask_login import current_user
 from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy_json import MutableJson
 
 from datetime import date, datetime
 import secrets
@@ -18,7 +18,7 @@ class Test(db.Model):
     time_limit = db.Column(db.Integer, nullable=True)
     creator_id = db.Column(db.String(36), db.ForeignKey('user.id'))
     dataset_id = db.Column(db.String(36), db.ForeignKey('dataset.id'))
-    adjustments = db.Column(JsonEncodedDict, nullable=True)
+    adjustments = db.Column(MutableJson, nullable=True)
     entries = db.relationship('Entry', backref='test')
 
     def __repr__(self):
diff --git a/ref-test/app/tools/forms.py b/ref-test/app/tools/forms.py
index 7299647..f9b9fb1 100644
--- a/ref-test/app/tools/forms.py
+++ b/ref-test/app/tools/forms.py
@@ -9,24 +9,6 @@ from wtforms.validators import ValidationError
 import json
 from sqlalchemy.ext import mutable
 
-class JsonEncodedDict(db.TypeDecorator):
-    """Enables JSON storage by encoding and decoding on the fly."""
-    impl = db.Text
-
-    def process_bind_param(self, value, dialect):
-        if value is None:
-            return '{}'
-        else:
-            return json.dumps(value)
-
-    def process_result_value(self, value, dialect):
-        if value is None:
-            return {}
-        else:
-            return json.loads(value)
-
-mutable.MutableDict.associate_with(JsonEncodedDict)
-
 def value(min:int=0, max:int=None):
     if not max:
         message = f'Value must be greater than {min}.'
diff --git a/ref-test/requirements.txt b/ref-test/requirements.txt
index 898dd2d..f55da7c 100644
--- a/ref-test/requirements.txt
+++ b/ref-test/requirements.txt
@@ -22,6 +22,7 @@ PyMySQL==1.0.2
 python-dotenv==0.20.0
 six==1.16.0
 SQLAlchemy==1.4.40
+sqlalchemy-json==0.5.0
 SQLAlchemy-Utils==0.38.3
 visitor==0.1.3
 Werkzeug==2.2.2