diff --git a/pyproject.toml b/pyproject.toml
index da272d0..2156c4f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -71,6 +71,13 @@ torch = { index = "pytorch-cu121" }
 torchvision = { index = "pytorch-cu121" }
 torchaudio = { index = "pytorch-cu121" }
 
+# Override enum34 dependency to only install on Python < 3.4
+# (which effectively never happens since we require Python >= 3.9)
+# enum34 is an obsolete backport incompatible with PyInstaller
+[tool.uv]
+override-dependencies = [
+    "enum34; python_version < '3.4'"
+]
 
 [tool.ruff]
 line-length = 100