diff --git a/backend/requirements.txt b/backend/requirements.txt
index 644ecc2..fe235a4 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -51,6 +51,7 @@ pydantic==2.10.1
 pydantic_core==2.27.1
 Pygments==2.18.0
 PyJWT==2.10.0
+PyPDF2==3.0.1
 python-dateutil==2.9.0.post0
 python-dotenv==1.0.1
 python-jose==3.3.0
@@ -66,6 +67,7 @@ scipy==1.14.1
 six==1.16.0
 sniffio==1.3.1
 SQLAlchemy==2.0.36
+sse-starlette==1.6.5
 starlette==0.41.3
 sympy==1.13.1
 termcolor==2.5.0
@@ -81,4 +83,3 @@ urllib3==2.2.3
 uvicorn==0.32.1
 xxhash==3.5.0
 yarl==1.18.0
-sse-starlette==1.6.5