diff --git a/backend/app/dependencies.py b/backend/app/dependencies.py
index 722fdabf..078f36a5 100644
--- a/backend/app/dependencies.py
+++ b/backend/app/dependencies.py
@@ -1,16 +1,13 @@
 from fastapi import Depends, HTTPException, status, Request
 from fastapi.security import APIKeyHeader, OAuth2PasswordBearer
 from jose import JWTError, jwe, jwt
-from Crypto.Protocol.KDF import HKDF
-from Crypto.Hash import SHA256
+from cryptography.hazmat.primitives.kdf.hkdf import HKDF
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.backends import default_backend
 from typing import Any
 import json
-import logging
 from app.config import get_settings
-
-
-logger = logging.getLogger(__name__)
-logger.setLevel(logging.INFO)
+from app.utils import logger
 
 
 api_key_header = APIKeyHeader(name=get_settings().API_KEY_NAME, auto_error=False)
@@ -43,14 +40,14 @@ def get_user(user_id: str):
 
 def get_derived_encryption_key(secret: str) -> Any:
     context = str.encode("NextAuth.js Generated Encryption Key")
-    return HKDF(
-        master=secret.encode(),
-        key_len=32,
-        salt="".encode(),
-        hashmod=SHA256,
-        num_keys=1,
-        context=context,
+    hkdf = HKDF(
+        algorithm=hashes.SHA256(),
+        length=32,
+        salt=b"",
+        info=context,
+        backend=default_backend()
     )
+    return hkdf.derive(secret.encode())
 
 
 def get_token_payload(token: str, secret: str) -> dict[str, Any]:
diff --git a/backend/app/plan/router.py b/backend/app/plan/router.py
index 430ba8cd..e0c975b3 100644
--- a/backend/app/plan/router.py
+++ b/backend/app/plan/router.py
@@ -1,9 +1,9 @@
 from fastapi import APIRouter, Depends
 from app.dependencies import validate_token
 from app.plan.schemas import PlanTriggerRequest
-from app.utils import read_csv_from_s3
+from app.utils import read_csv_from_s3, logger
 from app.config import get_settings
-from app.utils import logger
+
 
 router = APIRouter(
     prefix="/plan",
diff --git a/backend/app/utils.py b/backend/app/utils.py
index 4780a5ca..77d220ae 100644
--- a/backend/app/utils.py
+++ b/backend/app/utils.py
@@ -3,6 +3,11 @@ import csv
 from io import StringIO
 import string
 import secrets
+import logging
+
+
+logger = logging.getLogger(__name__)
+logger.setLevel(logging.INFO)
 
 
 def read_csv_from_s3(bucket_name, filepath):
diff --git a/backend/docker/Dockerfile.lambda b/backend/docker/Dockerfile.lambda
new file mode 100644
index 00000000..4d54befe
--- /dev/null
+++ b/backend/docker/Dockerfile.lambda
@@ -0,0 +1,11 @@
+FROM python:3.10.12-slim-buster
+
+WORKDIR /var/task
+
+# Install python dependencies
+COPY ./requirements/base.txt ./requirements/base.txt
+RUN pip install --upgrade pip
+RUN pip install -r requirements/base.txt
+
+# Copy project
+COPY . .
diff --git a/backend/requirements/base.txt b/backend/requirements/base.txt
index 11cd3326..923f17f9 100644
--- a/backend/requirements/base.txt
+++ b/backend/requirements/base.txt
@@ -25,5 +25,4 @@ uvicorn==0.22.0
 uvloop==0.17.0
 watchfiles==0.19.0
 websockets==11.0.3
-boto3
-pycryptodome
\ No newline at end of file
+boto3
\ No newline at end of file