diff --git a/common/models/voucher.py b/common/models/voucher.py
index bff755df..a3485fd2 100644
--- a/common/models/voucher.py
+++ b/common/models/voucher.py
@@ -1,16 +1,19 @@
 import uuid
 
 from sqlalchemy import Column, Text, Integer, ForeignKey, UUID, LargeBinary
-from sqlalchemy.orm import relationship, backref
+from sqlalchemy.orm import relationship, backref, Mapped
 
 from common.models.base import Base, TimeStampMixin, AutoIdMixin
+from common.models.product import Product
+from common.models.receipt import Receipt
 from common.utils.receipt import PlanetID
 
 
 class VoucherRequest(AutoIdMixin, TimeStampMixin, Base):
     __tablename__ = "voucher_request"
     receipt_id = Column(Integer, ForeignKey("receipt.id"), nullable=False)
-    receipt = relationship("Receipt", foreign_keys=[receipt_id], uselist=False, backref=backref("voucher_request"))
+    receipt: Mapped["Receipt"] = relationship("Receipt", foreign_keys=[receipt_id], uselist=False,
+                                              backref=backref("voucher_request"))
 
     # Copy all required data to view all info solely with this table
     uuid = Column(UUID(as_uuid=True), nullable=False, index=True, default=uuid.uuid4,
@@ -20,7 +23,7 @@ class VoucherRequest(AutoIdMixin, TimeStampMixin, Base):
     planet_id = Column(LargeBinary(length=12), nullable=False, default=PlanetID.ODIN.value,
                        doc="An identifier of planets")
     product_id = Column(Integer, ForeignKey("product.id"), nullable=False)
-    product = relationship("Product", foreign_keys=[product_id], uselist=False)
+    product: Mapped["Product"] = relationship("Product", foreign_keys=[product_id], uselist=False)
     product_name = Column(Text, nullable=False)
 
     # Voucher request result
diff --git a/iap/api/purchase.py b/iap/api/purchase.py
index 17ca9a7b..1ddc627d 100644
--- a/iap/api/purchase.py
+++ b/iap/api/purchase.py
@@ -167,6 +167,7 @@ def request_product(receipt_data: ReceiptSchema, sess=Depends(session)):
                             MessageBody=json.dumps({
                                 "id": receipt.id,
                                 "uuid": str(receipt.uuid),
+                                "receipt_id": receipt.id,
                                 "product_id": receipt.product_id,
                                 "product_name": receipt.product.name,
                                 "agent_addr": receipt.agent_addr,
diff --git a/worker/worker/voucher.py b/worker/worker/voucher.py
index 1913da8a..c1822028 100644
--- a/worker/worker/voucher.py
+++ b/worker/worker/voucher.py
@@ -9,6 +9,7 @@
 from common import logger
 from common.models.voucher import VoucherRequest
 from common.utils.aws import fetch_secrets, fetch_parameter
+from common.utils.receipt import PlanetID
 from schemas.aws import SQSMessage
 
 DB_URI = os.environ.get("DB_URI")
@@ -66,7 +67,8 @@ def handle(event, context):
     message = SQSMessage(Records=event.get("Records", {}))
     logger.info(f"SQS Message: {message}")
 
-    with scoped_session(sessionmaker(bind=engine)) as sess:
+    sess = scoped_session(sessionmaker(bind=engine))
+    try:
         uuid_list = [x.body.get("uuid") for x in message.Records if x.body.get("uuid")]
         voucher_list = sess.scalars(select(VoucherRequest.uuid).where(VoucherRequest.uuid.in_(uuid_list))).fetchall()
         target_message_list = [x.body for x in message.Records if
@@ -74,7 +76,11 @@ def handle(event, context):
 
         for msg in target_message_list:
             voucher = VoucherRequest(**msg)
+            voucher.planet_id = PlanetID(voucher.planet_id.encode())
             sess.add(voucher)
             sess.commit()
             sess.refresh(voucher)
             request(sess, voucher)
+    finally:
+        if sess is not None:
+            sess.close()