diff --git a/client/models.py b/client/models.py
index c8c6b76..3bfe293 100644
--- a/client/models.py
+++ b/client/models.py
@@ -3,7 +3,7 @@ from django.db import models
 
 class TaxType(models.Model):
     name = models.CharField(max_length=15)
-    percentage = models.DecimalField()
+    percentage = models.DecimalField(max_digits=3, decimal_places=2)
 
     def __str__(self):
         return self.name
diff --git a/employee/models.py b/employee/models.py
index 817bd9e..31ee860 100644
--- a/employee/models.py
+++ b/employee/models.py
@@ -8,7 +8,7 @@ class Employee(models.Model):
     user = models.OneToOneField(User, on_delete=models.CASCADE)
     employee_id = models.CharField(max_length=15)
     phone = PhoneNumberField()
-    salary = models.DecimalField()
+    salary = models.DecimalField(max_digits=10, decimal_places=2)
     start_date = models.DateField()
     end_date = models.DateField(null=True, blank=True)
     projects = models.ManyToManyField(Project)
diff --git a/invoice/models.py b/invoice/models.py
index a4ea0f7..804d1bb 100644
--- a/invoice/models.py
+++ b/invoice/models.py
@@ -16,7 +16,7 @@ class Invoice(models.Model):
 
 class Item(models.Model):
     name = models.TextField(blank=False, null=False)
-    amount = models.DecimalField()
+    amount = models.DecimalField(max_digits=15, decimal_places=2)
     quantity = models.IntegerField()
     invoice = models.ForeignKey(Invoice, on_delete=models.CASCADE)
 
diff --git a/project/models.py b/project/models.py
index 003d367..ace63ea 100644
--- a/project/models.py
+++ b/project/models.py
@@ -6,7 +6,7 @@ class Project(models.Model):
     name = models.CharField(max_length=30)
     project_image = models.ImageField(upload_to='project_images', null=True, blank=True)
     client = models.ForeignKey(Client, on_delete=models.CASCADE)
-    total_compensation = models.DecimalField()
+    total_compensation = models.DecimalField(max_digits=15, decimal_places=2)
     start_date = models.DateField()
     end_date = models.DateField()
 
diff --git a/requirements.txt b/requirements.txt
index 2081d3f..560bc69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,8 @@ coreschema==0.0.4
 Django==4.0.6
 django-cors-headers==3.13.0
 django-filter==22.1
+django-phonenumber-field==6.3.0
+django-phonenumbers==1.0.1
 django-sendgrid-v5==1.2.0
 djangorestframework==3.13.1
 drf-yasg==1.20.0
@@ -17,6 +19,8 @@ Jinja2==3.1.2
 Markdown==3.3.7
 MarkupSafe==2.1.1
 packaging==21.3
+phonenumbers==8.12.51
+Pillow==9.2.0
 pyparsing==3.0.9
 python-http-client==3.3.7
 pytz==2022.1