diff --git a/xFormers.md b/xFormers.md
index 222198f..0968eae 100644
--- a/xFormers.md
+++ b/xFormers.md
@@ -6,7 +6,7 @@ xFormers speeds up image generation, but can sometimes produce non-deterministic
 1. Double-click `Developer Console.cmd` (on Windows) or run `./developer_console.sh` (on Linux/Mac)
 2. Run `python -m pip show torch torchvision` (**important:** please make a note of these two versions, incase you need to revert back to them)
 3. Run the follow command:
- `python -m pip install --upgrade torch==2.0.0+cu118 torchvision==0.15.1+cu118 xformers==0.0.19 --index-url https://download.pytorch.org/whl/cu118`
+ `python -m pip install --upgrade torch==2.0.0+cu118 torchvision==0.15.1+cu118 xformers==0.0.19 --extra-index-url https://download.pytorch.org/whl/cu118`
 
 That should be enough, you can now start Easy Diffusion like normal.