diff --git a/pkg/cmd/root.go b/pkg/cmd/root.go
index 3203ced25..f241483a9 100644
--- a/pkg/cmd/root.go
+++ b/pkg/cmd/root.go
@@ -84,6 +84,7 @@ Environment variables:
 | $HELM_QPS                          | set the Queries Per Second in cases where a high number of calls exceed the option for higher burst values |
 | $HELM_COLOR                        | set color output mode. Allowed values: never, always, auto (default: never)                                |
 | $NO_COLOR                          | set to any non-empty value to disable all colored output (overrides $HELM_COLOR)                           |
+| $SOURCE_DATE_EPOCH                 | set a Unix timestamp for reproducible chart archives                                                       |
 
 Helm stores cache, configuration, and data based on the following configuration order: