diff --git a/backend/app/core/config.py b/backend/app/core/config.py
index 981298f..1f4d330 100644
--- a/backend/app/core/config.py
+++ b/backend/app/core/config.py
@@ -1,5 +1,5 @@
 import os
-from pydantic import BaseSettings
+from pydantic_settings import BaseSettings
 
 
 class Settings(BaseSettings):
diff --git a/backend/app/services/embeddings.py b/backend/app/services/embeddings.py
index 316f682..ec5cfdd 100644
--- a/backend/app/services/embeddings.py
+++ b/backend/app/services/embeddings.py
@@ -1,17 +1,20 @@
-import google.generativeai as genai
+from google import genai
 from typing import List
 from app.core.config import settings
 
-genai.configure(api_key=settings.GEMINI_API_KEY)
-
 
 def embed_texts(texts: List[str]) -> List[List[float]]:
+    client = genai.Client(api_key=settings.GEMINI_API_KEY)
     embeddings = []
+    
     for text in texts:
-        result = genai.embed_content(
-            model="models/embedding-001",
-            content=text,
-            task_type="retrieval_document"
+        result = client.models.embed_content(
+            model="text-embedding-004",
+            contents=text,
         )
-        embeddings.append(result["embedding"])
+        if hasattr(result, 'embeddings') and result.embeddings:
+             embeddings.append(result.embeddings[0].values)
+        elif hasattr(result, 'embedding'):
+             embeddings.append(result.embedding.values)
+        
     return embeddings
diff --git a/backend/app/services/generator.py b/backend/app/services/generator.py
index bb236e6..d95a99b 100644
--- a/backend/app/services/generator.py
+++ b/backend/app/services/generator.py
@@ -1,8 +1,6 @@
-import google.generativeai as genai
+from google import genai
 from app.core.config import settings
 
-genai.configure(api_key=settings.GEMINI_API_KEY)
-
 
 def generate_answer(context: str, question: str) -> str:
     prompt = f"""
@@ -17,6 +15,9 @@ def generate_answer(context: str, question: str) -> str:
 {question}
 """
 
-    model = genai.GenerativeModel("gemini-1.5-flash")
-    response = model.generate_content(prompt)
-    return response.text.strip()
+    client = genai.Client(api_key=settings.GEMINI_API_KEY)
+    response = client.models.generate_content(
+        model="gemini-2.5-flash",
+        contents=prompt
+    )
+    return response.text
diff --git a/backend/app/services/loader.py b/backend/app/services/loader.py
index 6c615a7..02212ae 100644
--- a/backend/app/services/loader.py
+++ b/backend/app/services/loader.py
@@ -1,5 +1,6 @@
 from pathlib import Path
-from PyPDF2 import PdfReader
+from pypdf import PdfReader
+
 
 
 def load_text_from_pdf(file_path: Path) -> str:
diff --git a/backend/requirements.txt b/backend/requirements.txt
index f606e0e..9110852 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,18 +1,14 @@
 fastapi>=0.109.0
 uvicorn>=0.27.0
+
 pydantic>=2.6.0
 pydantic-settings>=2.1.0
 python-dotenv>=1.0.1
-langchain>=0.1.0
-langchain-openai>=0.0.5
-langchain-google-genai>=0.0.5
-faiss-cpu>=1.7.4
+
 python-multipart>=0.0.7
-aiofiles>=23.2.1
 httpx>=0.26.0
 beautifulsoup4>=4.12.3
-mypy>=1.8.0
-black>=24.1.0
-isort>=5.13.2
-flake8>=7.0.0
-pytest>=8.0.0
+pypdf>=4.0.0
+
+faiss-cpu>=1.7.4
+google-genai>=1.0.0