diff --git a/services/rag/langchain/agent.py b/services/rag/langchain/agent.py
index b8a2bdd..13ad327 100644
--- a/services/rag/langchain/agent.py
+++ b/services/rag/langchain/agent.py
@@ -2,6 +2,7 @@
 
 import os
 from typing import List, Dict, Any, Optional, Tuple
+from dotenv import load_dotenv
 from langchain_core.tools import BaseTool, tool
 from langchain_core.runnables import RunnableConfig
 from langchain_core.messages import HumanMessage, AIMessage, BaseMessage
@@ -15,6 +16,9 @@ from loguru import logger
 from retrieval import create_retriever
 from vector_storage import initialize_vector_store
 
+# Load environment variables
+load_dotenv()
+
 
 def get_llm_model_info(llm_model: str = None) -> Tuple[str, str, str, str, str]:
     """
diff --git a/services/rag/langchain/cli.py b/services/rag/langchain/cli.py
index 9e3e147..5017ee4 100644
--- a/services/rag/langchain/cli.py
+++ b/services/rag/langchain/cli.py
@@ -1,9 +1,13 @@
 import os
 from pathlib import Path
+from dotenv import load_dotenv
 
 import click
 from loguru import logger
 
+# Load environment variables
+load_dotenv()
+
 
 # Configure logging to output to both file and stdout as specified in requirements
 def setup_logging():
diff --git a/services/rag/langchain/enrichment.py b/services/rag/langchain/enrichment.py
index 37efe7c..072f3b6 100644
--- a/services/rag/langchain/enrichment.py
+++ b/services/rag/langchain/enrichment.py
@@ -4,6 +4,7 @@ import os
 import hashlib
 from pathlib import Path
 from typing import List, Dict, Any
+from dotenv import load_dotenv
 from langchain_core.documents import Document
 from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_community.document_loaders import PyPDFLoader
@@ -38,6 +39,9 @@ from sqlalchemy.orm import sessionmaker
 from loguru import logger
 import sqlite3
 
+# Load environment variables
+load_dotenv()
+
 
 # Define the path to the data directory
 DATA_DIR = Path("../../../data").resolve()
diff --git a/services/rag/langchain/retrieval.py b/services/rag/langchain/retrieval.py
index 87431a6..8ef228b 100644
--- a/services/rag/langchain/retrieval.py
+++ b/services/rag/langchain/retrieval.py
@@ -2,6 +2,7 @@
 
 import os
 from typing import List, Optional
+from dotenv import load_dotenv
 from langchain_core.retrievers import BaseRetriever
 from langchain_core.callbacks import CallbackManagerForRetrieverRun
 from langchain_core.documents import Document
@@ -9,6 +10,9 @@ from loguru import logger
 
 from vector_storage import initialize_vector_store
 
+# Load environment variables
+load_dotenv()
+
 
 class VectorStoreRetriever(BaseRetriever):
     """
diff --git a/services/rag/langchain/server.py b/services/rag/langchain/server.py
index ea58191..37cae8e 100644
--- a/services/rag/langchain/server.py
+++ b/services/rag/langchain/server.py
@@ -4,6 +4,7 @@ import json
 import os
 from contextlib import asynccontextmanager
 from typing import Any, Dict
+from dotenv import load_dotenv
 
 from fastapi import FastAPI, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
@@ -12,6 +13,9 @@ from pydantic import BaseModel
 
 from agent import chat_with_agent, get_llm_model_info
 
+# Load environment variables
+load_dotenv()
+
 
 class QueryRequest(BaseModel):
     """Request model for the query endpoint."""