diff --git a/pyproject.toml b/pyproject.toml
index e264e2f..5b26bdd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,11 +52,17 @@ build-backend = "hatchling.build"
 [tool.hatch.build.targets.wheel]
 packages = ["client", "gui"]
 
-[tool.uv]
-dev-dependencies = [
+[dependency-groups]
+dev = [
     "pyinstaller>=6.17.0",
 ]
 
+# Use PyTorch CUDA index by default
+# CUDA builds work on both GPU and CPU systems (fallback to CPU if no GPU)
+[[tool.uv.index]]
+url = "https://download.pytorch.org/whl/cu121"
+default = true
+
 [tool.ruff]
 line-length = 100
 target-version = "py39"