diff --git a/apps/transactions/admin.py b/apps/transactions/admin.py
index c00b2ba..75c10bf 100755
--- a/apps/transactions/admin.py
+++ b/apps/transactions/admin.py
@@ -4,7 +4,7 @@ from .models import Transaction
 
 class TransactionAdmin(admin.ModelAdmin):
     fields = [
-        'code',
+        'uuid',
         'amount',
         'payer',
         'payee',
@@ -15,7 +15,7 @@ class TransactionAdmin(admin.ModelAdmin):
         'detail_id',
         'application_id'
     ]
-    readonly_fields = ['last_update', 'create', 'detail_id', 'application_id']
+    readonly_fields = ['uuid', 'last_update', 'create', 'detail_id', 'application_id']
 
 
 admin.site.register(Transaction, TransactionAdmin)
diff --git a/apps/transactions/migrations/0003_remove_transaction_code.py b/apps/transactions/migrations/0003_remove_transaction_code.py
new file mode 100644
index 0000000..b860851
--- /dev/null
+++ b/apps/transactions/migrations/0003_remove_transaction_code.py
@@ -0,0 +1,17 @@
+# Generated by Django 3.0.4 on 2020-04-04 06:53
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('transactions', '0002_auto_20200308_1113'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='transaction',
+            name='code',
+        ),
+    ]
diff --git a/apps/transactions/models.py b/apps/transactions/models.py
index 9c79708..4b28c87 100755
--- a/apps/transactions/models.py
+++ b/apps/transactions/models.py
@@ -1,5 +1,4 @@
 import datetime
-import random
 import uuid
 
 from django.db import models
@@ -40,7 +39,6 @@ class TransactionManager(models.Manager):
         if state:
             transaction.state = state
 
-        transaction.set_code()
         transaction.save()
         return transaction
 
@@ -54,7 +52,6 @@ class Transaction(models.Model):
         (5, 'done', 'done'),
     )
     uuid = models.UUIDField(primary_key=True, editable=False, default=uuid.uuid4, unique=True, db_index=True)  # reserve_code
-    code = models.IntegerField(_('code'), blank=False, unique=True, db_index=True)  # unique random number
     amount = models.IntegerField(_('amount'), blank=False)
     delay = models.IntegerField(default=0, blank=True)  # number of days for delayed payments
     payer = models.ForeignKey(User, on_delete=models.PROTECT, related_name='payments', blank=True, null=True)
@@ -70,18 +67,6 @@ class Transaction(models.Model):
     class Meta:
         unique_together = ('application_id', 'detail_id',)
 
-    def set_code(self):
-        # TODO: set infinite algorithm
-        for code in random.sample(range(10000, 100000), 90000):
-            try:
-                code = str(code)
-                self.code = code
-                return self.save()
-            except:
-                pass
-
-        raise APIException('system error')
-
     def pay(self, payer=None):
         if not self.payer and not payer:
             raise APIException('payer identification error')
@@ -136,4 +121,4 @@ class Transaction(models.Model):
             self.save()
 
     def __str__(self):
-        return f"{self.payer} -> {self.payee} ({self.code}): {self.amount}"
+        return f"{self.payer} -> {self.payee} ({self.uuid}): {self.amount}"
diff --git a/apps/transactions/serializers.py b/apps/transactions/serializers.py
index 1c2241e..09f2838 100755
--- a/apps/transactions/serializers.py
+++ b/apps/transactions/serializers.py
@@ -12,11 +12,11 @@ class TransactionSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = Transaction
-        fields = ('payer',
+        fields = ('uuid',
+                  'payer',
                   'payee',
                   "create",
                   "state",
-                  "code",
                   'amount',
                   'delay',
                   'last_update',
@@ -24,7 +24,7 @@ class TransactionSerializer(serializers.ModelSerializer):
                   'application_id'
                   )
 
-        read_only_fields = ['last_update', 'code', 'state', 'create', 'detail_id', 'application_id']
+        read_only_fields = ['uuid', 'last_update', 'state', 'create', 'detail_id', 'application_id']
 
     def create(self, validated_data):
 
diff --git a/apps/transactions/views.py b/apps/transactions/views.py
index 0423184..8a08901 100755
--- a/apps/transactions/views.py
+++ b/apps/transactions/views.py
@@ -31,7 +31,7 @@ class TransactionList(generics.ListCreateAPIView):
 class TransactionDetail(generics.RetrieveAPIView):
     permission_classes = [permissions.IsAuthenticated, IsAuthenticatedOrTokenHasScope]
     serializer_class = TransactionSerializer
-    lookup_field = 'code'
+    lookup_field = 'uuid'
     required_scopes = []
 
     def get_queryset(self):
@@ -42,7 +42,7 @@ class TransactionDetail(generics.RetrieveAPIView):
 class TransactionPay(generics.RetrieveAPIView):
     permission_classes = [permissions.IsAuthenticated, IsAuthenticatedOrTokenHasScope]
     serializer_class = TransactionSerializer
-    lookup_field = 'code'
+    lookup_field = 'uuid'
     required_scopes = []
 
     def get_queryset(self):
@@ -59,7 +59,7 @@ class TransactionPay(generics.RetrieveAPIView):
 class TransactionReceipt(generics.RetrieveAPIView):
     permission_classes = [permissions.IsAuthenticated, IsAuthenticatedOrTokenHasScope]
     serializer_class = TransactionSerializer
-    lookup_field = 'code'
+    lookup_field = 'uuid'
     required_scopes = []
 
     def get_queryset(self):
diff --git a/gooyal_accounts/urls.py b/gooyal_accounts/urls.py
index 3c7cbe7..412dc07 100644
--- a/gooyal_accounts/urls.py
+++ b/gooyal_accounts/urls.py
@@ -34,16 +34,16 @@ urlpatterns = [
 
     path('oauth2/', include('oauth2_provider.urls', namespace='oauth2_provider')),
 
+    path('account/', AccountView.as_view(), name='account'),
     path('users/', UserListView.as_view()),
     path('users/<uuid>/', UserDetailView.as_view(), name='user_detail'),
-    path('account/', AccountView.as_view(), name='account'),
     path('request_otp/', RequestOTPView.as_view(), name='register'),
     path('change_password/', ChangePasswordView.as_view(), name='change_password'),
 
     path('transactions/', TransactionList.as_view(), name='transactions'),
-    path('transactions/<code>', TransactionDetail.as_view(), name='transaction_detail'),
-    path('transactions/<code>/pay', TransactionPay.as_view(), name='transaction_pay'),
-    path('transactions/<code>/receipt', TransactionReceipt.as_view(), name='transaction_receipt'),
+    path('transactions/<uuid>', TransactionDetail.as_view(), name='transaction_detail'),
+    path('transactions/<uuid>/pay', TransactionPay.as_view(), name='transaction_pay'),
+    path('transactions/<uuid>/receipt', TransactionReceipt.as_view(), name='transaction_receipt'),
 ]
 
 urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
diff --git a/templates/base.html b/templates/base.html
index 627058e..3ee1113 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -30,7 +30,7 @@
     </head>
     <body class="font-vazir" style="direction: rtl; text-align: right">
     <nav class="navbar navbar-expand-lg navbar-light bg-light">
-        <a class="navbar-brand" href="#">Toomar</a>
+        <a class="navbar-brand" href="#">{{ site_title }}</a>
         <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav"
                 aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
             <span class="navbar-toggler-icon"></span>