diff --git a/api/models/call_log_event.py b/api/models/call_log_event.py
index 6ab866c..14ed7c2 100644
--- a/api/models/call_log_event.py
+++ b/api/models/call_log_event.py
@@ -1,8 +1,18 @@
 from api.mixins import TimestampMixin
 from api import db
+from flask_sqlalchemy.query import Query as BaseQuery
+
+
+class CallLogEventQuery(BaseQuery):
+    def call_sid_exist(self, form_data):
+        return (
+            self.filter(CallLogEvent.call_sid == form_data["CallSid"]).first()
+            is not None
+        )
 
 
 class CallLogEvent(TimestampMixin, db.Model):
+    query_class = CallLogEventQuery
     __tablename__ = "call_log_event"
     id = db.Column(db.Integer, primary_key=True)
     call_sid = db.Column(db.String(255))
diff --git a/api/models/registration.py b/api/models/registration.py
index 5a756bd..90ea7c0 100644
--- a/api/models/registration.py
+++ b/api/models/registration.py
@@ -10,6 +10,7 @@ class Registration(TimestampMixin, db.Model):
     user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
     partner_id = db.Column(db.Integer, db.ForeignKey("partner.id"))
     program_id = db.Column(db.Integer, db.ForeignKey("program.id"))
+    language_id = db.Column(db.Integer)
     district = db.Column(db.String(100), nullable=True)
     state = db.Column(db.String(100), nullable=True)
     parent_type = db.Column(db.String(100), nullable=True)
diff --git a/api/models/system_phone.py b/api/models/system_phone.py
index 2efc934..65ece13 100644
--- a/api/models/system_phone.py
+++ b/api/models/system_phone.py
@@ -1,8 +1,20 @@
 from api.mixins import TimestampMixin
 from api import db
+from flask_sqlalchemy.query import Query as BaseQuery
+
+
+class SystemPhoneQuery(BaseQuery):
+    def system_phone_exists(self, url_decoded_system_phone):
+        return (
+            self.filter(
+                SystemPhone.phone.contains(url_decoded_system_phone[-10:])
+            ).first()
+            is not None
+        )
 
 
 class SystemPhone(TimestampMixin, db.Model):
+    query_class = SystemPhoneQuery
     __tablename__ = "system_phone"
     id = db.Column(db.Integer, primary_key=True)
     phone = db.Column(db.String(50))
diff --git a/api/models/user.py b/api/models/user.py
index 835d99b..df98c21 100644
--- a/api/models/user.py
+++ b/api/models/user.py
@@ -1,6 +1,6 @@
 from api.mixins import TimestampMixin
 from api import db
-from flask_sqlalchemy import BaseQuery
+from flask_sqlalchemy.query import Query as BaseQuery
 
 
 class UserQuery(BaseQuery):
diff --git a/api/models/user_program.py b/api/models/user_program.py
index 2632d31..ca83077 100644
--- a/api/models/user_program.py
+++ b/api/models/user_program.py
@@ -1,7 +1,7 @@
 from api.mixins import TimestampMixin
 from api import db
 from api import app, models, helpers
-from flask_sqlalchemy import BaseQuery
+from flask_sqlalchemy.query import Query as BaseQuery
 from api.helpers.common_helper import current_ist_time
 
 
diff --git a/api/services/call_log_event_service.py b/api/services/call_log_event_service.py
index bac1cd4..8fefc75 100644
--- a/api/services/call_log_event_service.py
+++ b/api/services/call_log_event_service.py
@@ -1,6 +1,5 @@
 # This file is treated as service layer
-from flask import request
-from api import helpers, models, db
+from api import helpers, models
 from datetime import datetime
 from utils.loggingutils import logger
 import traceback
diff --git a/api/services/handle_event_service.py b/api/services/handle_event_service.py
index e394bfa..65dc091 100644
--- a/api/services/handle_event_service.py
+++ b/api/services/handle_event_service.py
@@ -1,6 +1,5 @@
 import requests
-from flask import request
-from api import models, db, app
+from api import models, app
 from . import user_service as user
 from . import registration_service as registration
 from . import call_log_event_service as call_log_event
@@ -10,18 +9,16 @@
 
 class HandleEventService:
     def handle_event_service(self, form_data):
-        call_sid_exist = db.session.query(
-            db.exists().where(models.CallLogEvent.call_sid == form_data["CallSid"])
-        ).scalar()
+        call_sid_exist = models.CallLogEvent.query.call_sid_exist(form_data)
 
         if call_sid_exist:
             return
 
         url_decoded_system_phone = requests.utils.unquote(form_data["To"])
 
-        system_phone_exists = db.session.query(
-            db.exists().where(models.SystemPhone.phone == url_decoded_system_phone)
-        ).scalar()
+        system_phone_exists = models.SystemPhone.query.system_phone_exists(
+            url_decoded_system_phone
+        )
 
         if not system_phone_exists:
             return
diff --git a/config.py b/config.py
index d07abdb..ec9dfa7 100644
--- a/config.py
+++ b/config.py
@@ -34,7 +34,6 @@
         % POSTGRES
     )
 
-SQLALCHEMY_TRACK_MODIFICATIONS = True
 WTF_CSRF_ENABLED = True
 SECRET_KEY = os.environ.get("SECRET_KEY")
 
diff --git a/main.py b/main.py
index 844ed88..fffc1ad 100644
--- a/main.py
+++ b/main.py
@@ -1,52 +1,52 @@
-# from pprint import pprint
-from api import models, db, services
-from flask import jsonify, request
+from api import app, services, helpers
+from flask import jsonify
 import json
 from utils.loggingutils import logger
 
 
 def callback(request):
-    json_data = None
-    form_data = None
+    with app.app_context():
+        json_data = None
+        form_data = None
 
-    if request.method == "POST":
-        content_type = request.headers.get("Content-Type")
+        if request.method == "POST":
+            content_type = request.headers.get("Content-Type")
 
-        if content_type == "application/json":
-            json_data = request.get_json()
-        else:
-            form_data = request.form
+            if content_type == "application/json":
+                json_data = request.get_json()
+            else:
+                form_data = request.form
 
-        transaction_log_service = services.TransactionLogService()
+            transaction_log_service = services.TransactionLogService()
 
-        try:
-            if json_data and json_data.get("type", None) == "retry_failed_log":
-                retry_failed_webhook(transaction_log_service)
-                return "Success"
+            try:
+                if json_data and json_data.get("type", None) == "retry_failed_log":
+                    retry_failed_webhook(transaction_log_service)
+                    return "Success"
 
-            ivr_transaction_log = (
-                transaction_log_service.create_new_ivr_transaction_log(form_data)
-            )
-        except Exception as e:
-            logger.error(
-                f"Issues with transaction logs creation for form data {form_data}. Error message: {e}"
-            )
+                ivr_transaction_log = (
+                    transaction_log_service.create_new_ivr_transaction_log(form_data)
+                )
+            except Exception as e:
+                logger.error(
+                    f"Issues with transaction logs creation for form data {form_data}. Error message: {e}"
+                )
 
-        processed = process_form_data(form_data)
+            processed = process_form_data(form_data)
 
-        if not processed:
-            return jsonify(message="Something went wrong!"), 400
+            if not processed:
+                return jsonify(message="Something went wrong!"), 400
 
-        transaction_log_service.mark_ivr_transaction_log_as_processed(
-            ivr_transaction_log
-        )
-    else:
-        return (
-            jsonify(message="Currently, the system do not accept a GET request"),
-            405,
-        )
+            transaction_log_service.mark_ivr_transaction_log_as_processed(
+                ivr_transaction_log
+            )
+        else:
+            return (
+                jsonify(message="Currently, the system do not accept a GET request"),
+                405,
+            )
 
-    return "Success"
+        return "Success"
 
 
 def retry_failed_webhook(transaction_log_service):
@@ -57,8 +57,7 @@ def retry_failed_webhook(transaction_log_service):
         payload["log_created_on"] = log.created_on
         log.processed = process_form_data(payload)
         log.attempts += 1
-        db.session.add(log)
-        db.session.commit()
+        helpers.save(log)
 
 
 def process_form_data(form_data):
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 89e6b9f..2219eaf 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
 # Includes dev dependencies on top of requirements.txt
 -r requirements.txt
-functions-framework==2.1.2
+functions-framework==3.5.0
 pre-commit==2.11.0
diff --git a/requirements.txt b/requirements.txt
index 46e0a2e..163ad58 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,18 +1,19 @@
 certifi==2020.12.5
 chardet==4.0.0
-click==7.1.2
-Flask==1.1.2
-requests==2.25.1
+click==8.1.3
+Flask==3.0.0
 python-dotenv==0.15.0
-Flask-SQLAlchemy==2.1
+Flask-SQLAlchemy==3.1.1
+functions-framework==3.5.0
 idna==2.10
-itsdangerous==1.1.0
-Jinja2==2.11.3
-MarkupSafe==1.1.1
-psycopg2==2.8.6
+itsdangerous==2.1.2
+Jinja2==3.1.2
+MarkupSafe==2.1.1
+psycopg2==2.9.9
 python-dotenv==0.15.0
-requests==2.25.1
-SQLAlchemy==1.3.23
+requests==2.31.0
+SQLAlchemy==2.0.23
 urllib3==1.26.3
-Werkzeug==1.0.1
+Werkzeug==3.0.0
+watchdog==3.0.0
 google-cloud-logging==3.5.0