diff --git a/README.md b/README.md
index 68d0887..9435e43 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,8 @@ Current formats are:
 - Base64
 
 `numf` also has the option of prepending a prefix for each format, such as
-`0x` for hexadecimal.
+`0x` for hexadecimal. Numbers may also be provided from the stdin. See `--help`
+flag for more information.
 
 ## Example