diff --git a/doc/env.md b/doc/env.md
index 3cf42b724a..4ca7101236 100644
--- a/doc/env.md
+++ b/doc/env.md
@@ -72,7 +72,7 @@ Default backend.
 
 :::{envvar} NUM_WORKERS
 
-**Default**: 8 or the number of cores (whichever is smaller)
+**Default**: 4 or the number of cores (whichever is smaller)
 
 {{ pytorch_icon }} Number of subprocesses to use for data loading in the PyTorch backend.
 See [PyTorch documentation](https://pytorch.org/docs/stable/data.html) for details.