diff --git a/app.py b/app.py
index b79f378..6f6b248 100644
--- a/app.py
+++ b/app.py
@@ -1,9 +1,13 @@
 from cryptography.hazmat.primitives import serialization
 from flask import Flask, request, jsonify
 from models import db, VAPIDKey, Subscription
-from py_vapid import Vapid
 from pywebpush import webpush, WebPushException
 
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import ec
+
+import binascii
 import base64
 import json
 import os
@@ -16,16 +20,24 @@ def create_app(config_name):
 
 
     def generate_and_save_vapid_keys():
-        vapid = Vapid()
         try:
-            vapid.generate_keys()
-            private_key = vapid.private_pem().decode('utf-8').strip()
-            public_key = vapid.public_pem().decode('utf-8').strip()
+            private_key = ec.generate_private_key(ec.SECP256R1(), default_backend())
+            public_key_bytes = private_key.public_key().public_bytes(
+                encoding=serialization.Encoding.X962,
+                format=serialization.PublicFormat.UncompressedPoint
+            )
+            public_key_base64 = base64.b64encode(public_key_bytes).decode()
+            
+            private_key_hex = binascii.hexlify(private_key.private_bytes(
+                encoding=serialization.Encoding.DER,
+                format=serialization.PrivateFormat.PKCS8,
+                encryption_algorithm=serialization.NoEncryption()
+            )).decode()
             
         except Exception as e:
             print(f"Error generating VAPID keys: {e}")
 
-        key = VAPIDKey(public_key=public_key, private_key=private_key)
+        key = VAPIDKey(public_key=public_key_base64, private_key=private_key_hex)
         db.session.add(key)
         db.session.commit()
 
@@ -37,48 +49,58 @@ def create_app(config_name):
 
     def send_push_notification(subscription_info, message, vapid_key):
         try:
+            private_key_bytes = bytes.fromhex(vapid_key.private_key)
+            
             webpush(
                 subscription_info=subscription_info,
                 data=json.dumps(message),
-                vapid_private_key=vapid_key.private_key,
+                vapid_private_key=private_key_bytes,
                 vapid_claims={
                     "sub": "mailto:your-email@example.com"
                 }
             )
+            
         except WebPushException as e:
             print(f"Failed to send notification: {e}")
 
+            
     def is_valid_base64_url(s):
         return re.match(r'^[A-Za-z0-9_-]*$', s) is not None
 
+    
     def is_valid_server_key(server_key):
         if not is_valid_base64_url(server_key):
             return False
 
         return len(server_key) == 88
 
-    @app.route('/web-push/vapid', methods=['GET'])
-    def get_vapid():
-        key = VAPIDKey.query.first()
-        pem_bytes = key.private_key.encode("utf-8")
-        private_key = serialization.load_pem_private_key(pem_bytes, password=None)
-        public_key = private_key.public_key()
-        public_key_der = public_key.public_bytes(
-            encoding=serialization.Encoding.DER,
-            format=serialization.PublicFormat.SubjectPublicKeyInfo
-        )
+    
+    @app.route('/web-push/clear_subscriptions', methods=['POST'])
+    def clear_subscriptions():
+        try:
+            Subscription.query.delete()
+            return jsonify(message='Subscriptions cleared')
         
-        base64_data = base64.urlsafe_b64encode(public_key_der)
-        base64_str = base64_data.decode('utf-8')
-        base64_str = base64_str.rstrip('=')
+        except Exception as e:
+            return jsonify(error=f'Error clearing subscriptions: {str(e)}'), 500
 
-        if is_valid_server_key(base64_str):
-            return jsonify(vapidKey=base64_str)
         
-        else:
-            return jsonify(error=f'VAPID server key is not valid. {len(base64_str)} {is_valid_base64_url(base64_str)}'), 422
+    @app.route('/web-push/regenerate_vapid_keys', methods=['POST'])
+    def regenerate_vapid_keys():
+        try:
+            # Generate new VAPID keys
+            VAPIDKey.query.delete()
+            generate_and_save_vapid_keys()
+            return jsonify(message='VAPID keys regenerated successfully')
         
-        return jsonify(error='No VAPID keys found'), 404
+        except Exception as e:
+            return jsonify(error=f'Error regenerating VAPID keys: {str(e)}'), 500
+
+    
+    @app.route('/web-push/vapid', methods=['GET'])
+    def get_vapid():
+        key = VAPIDKey.query.first()
+        return jsonify(vapidKey=key.public_key)
 
 
     @app.route('/web-push/subscribe', methods=['POST'])
@@ -128,4 +150,3 @@ def create_app(config_name):
         initialize()
         
     return app
-