diff --git a/instance/dotori.db b/instance/dotori.db
index f07a16f..3e79535 100644
Binary files a/instance/dotori.db and b/instance/dotori.db differ
diff --git a/models/__pycache__/dotori.cpython-313.pyc b/models/__pycache__/dotori.cpython-313.pyc
index 97ebce8..69560d2 100644
Binary files a/models/__pycache__/dotori.cpython-313.pyc and b/models/__pycache__/dotori.cpython-313.pyc differ
diff --git a/models/dotori.py b/models/dotori.py
index 9d0564f..17db2ab 100644
--- a/models/dotori.py
+++ b/models/dotori.py
@@ -6,15 +6,13 @@ class UserDotori(db.Model):
     __tablename__ = 'user_dotori'
     
     id = db.Column(db.Integer, primary_key=True)
-    user_id = db.Column(db.String(100), unique=True, nullable=False)
     dotori_count = db.Column(db.Integer, default=0)
     created_at = db.Column(db.DateTime, default=datetime.now)
     updated_at = db.Column(db.DateTime, default=datetime.now, onupdate=datetime.now)
 
     def to_dict(self):
         return {
-            'id': self.id,
-            'user_id': self.user_id,
+            'user_id': self.id,
             'dotori_count': self.dotori_count,
             'created_at': self.created_at.isoformat(),
             'updated_at': self.updated_at.isoformat()
@@ -22,7 +20,7 @@ class UserDotori(db.Model):
 
     def to_response(self):
         return {
-            'userId': self.user_id,
+            'userId': self.id,
             'dotory': self.dotori_count
         }
 
@@ -38,4 +36,4 @@ class UserDotori(db.Model):
             return self.dotori_count
         return False
     def __repr__(self):
-        return f"<UserDotori id={self.id} user_id={self.user_id} dotori_count={self.dotori_count}>"
\ No newline at end of file
+        return f"<UserDotori user_id={self.id} dotori_count={self.dotori_count}>"
\ No newline at end of file
diff --git a/routes/__pycache__/dotori.cpython-313.pyc b/routes/__pycache__/dotori.cpython-313.pyc
index 620dd9d..0bef195 100644
Binary files a/routes/__pycache__/dotori.cpython-313.pyc and b/routes/__pycache__/dotori.cpython-313.pyc differ
diff --git a/routes/dotori.py b/routes/dotori.py
index 0a71287..c7686c0 100644
--- a/routes/dotori.py
+++ b/routes/dotori.py
@@ -19,7 +19,7 @@ class UserDotori(Resource):
 
 @dotori_ns.route('')
 class InitializeDotori(Resource):
-    @dotori_ns.expect(dotori_ns.model('Initialize', {'userId': fields.String(required=True)}))
+    @dotori_ns.expect(dotori_ns.model('Initialize', {'userId': fields.Integer(required=True)}))
     def post(self):
         data = dotori_ns.payload
         user_id = data.get('userId')
diff --git a/services/__pycache__/dotori_service.cpython-313.pyc b/services/__pycache__/dotori_service.cpython-313.pyc
index 6c01416..247b723 100644
Binary files a/services/__pycache__/dotori_service.cpython-313.pyc and b/services/__pycache__/dotori_service.cpython-313.pyc differ
diff --git a/services/dotori_service.py b/services/dotori_service.py
index 6660c88..71b2471 100644
--- a/services/dotori_service.py
+++ b/services/dotori_service.py
@@ -3,25 +3,25 @@ from flask import current_app
 from db import db
 class DotoriService:
     @staticmethod
-    def get_user_dotori(user_id: str):
-        user_dotori = UserDotori.query.filter_by(user_id=user_id).first()
+    def get_user_dotori(user_id: int):
+        user_dotori = UserDotori.query.filter_by(id=user_id).first()
         if user_dotori:
             return user_dotori.dotori_count
         return None
 
     @staticmethod
-    def initialize_user_dotori(user_id: str):
-        user_dotori = UserDotori.query.filter_by(user_id=user_id).first()
+    def initialize_user_dotori(user_id: int):
+        user_dotori = UserDotori.query.filter_by(id=user_id).first()
         if not user_dotori:
-            user_dotori = UserDotori(user_id=user_id, dotori_count=1000000)
+            user_dotori = UserDotori(id=user_id, dotori_count=1000000)
             print(f"초기화 완료, {user_id}님의 도토리: {user_dotori.dotori_count}")
             db.session.add(user_dotori)
             db.session.commit()
         return user_dotori.dotori_count
 
     @staticmethod
-    def buy_product(user_id: str, product_price: int):
-        user_dotori = UserDotori.query.filter_by(user_id=user_id).first()
+    def buy_product(user_id: int, product_price: int):
+        user_dotori = UserDotori.query.filter_by(id=user_id).first()
         if not user_dotori:
             return False
         
@@ -33,10 +33,10 @@ class DotoriService:
         return True
 
     @staticmethod
-    def add_dotori(user_id: str, amount: int):
-        user_dotori = UserDotori.query.filter_by(user_id=user_id).first()
+    def add_dotori(user_id: int, amount: int):
+        user_dotori = UserDotori.query.filter_by(id=user_id).first()
         if not user_dotori:
-            user_dotori = UserDotori(user_id=user_id)
+            user_dotori = UserDotori(id=user_id)
             db.session.add(user_dotori)
         print(f"도토리 추가, {user_id}님의 도토리: {user_dotori.dotori_count} -> {user_dotori.dotori_count + amount}")
         user_dotori.increment(amount)
@@ -44,6 +44,6 @@ class DotoriService:
         return user_dotori.dotori_count
 
     @staticmethod
-    def get_all_users_dotori():
+    def get_all_users_dotori() -> list:
         users = UserDotori.query.all()
-        return [user.to_dict() for user in users]
+        return [user.to_response() for user in users]