diff --git a/backend/requirements.txt b/backend/requirements.txt
index 5ab7392..e854d50 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,7 +1,7 @@
 fastapi==0.109.0
 uvicorn[standard]==0.27.0
 python-multipart==0.0.6
-Pillow==10.2.0
+Pillow>=12.1.0,<13.0.0
 numpy==2.3.0
 sqlalchemy==2.0.25
 python-jose[cryptography]==3.3.0