diff --git a/backend/python/rfdetr/requirements-cpu.txt b/backend/python/rfdetr/requirements-cpu.txt
index d0d1f4afa..2f87c2117 100644
--- a/backend/python/rfdetr/requirements-cpu.txt
+++ b/backend/python/rfdetr/requirements-cpu.txt
@@ -1,3 +1,4 @@
+--extra-index-url https://download.pytorch.org/whl/cpu
 rfdetr
 opencv-python
 accelerate