diff --git a/pyproject.toml b/pyproject.toml
index 5b26bdd..20cdab9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,11 +57,15 @@ dev = [
     "pyinstaller>=6.17.0",
 ]
 
-# Use PyTorch CUDA index by default
+# Add PyTorch CUDA index as additional source
 # CUDA builds work on both GPU and CPU systems (fallback to CPU if no GPU)
 [[tool.uv.index]]
+name = "pytorch-cu121"
 url = "https://download.pytorch.org/whl/cu121"
-default = true
+
+# Tell uv to get torch from the PyTorch CUDA index
+[tool.uv.sources]
+torch = { index = "pytorch-cu121" }
 
 [tool.ruff]
 line-length = 100