diff --git a/README.md b/README.md
index cea2c0d..cf1d05f 100644
--- a/README.md
+++ b/README.md
@@ -44,4 +44,4 @@ Flags:
 ```
 
 On top of the following command-line flags, `go-cmw` can also take advantage of environment variables.
-`go-cmw` can take advantage of `GO_CMW_LOCATION` and `GO_CMW_LANGUAGE` environment variables if set.
\ No newline at end of file
+`go-cmw` can take advantage of `GO_CMW_FORMAT`, `GO_CMW_LOCATION` and `GO_CMW_LANGUAGE` environment variables if set.
\ No newline at end of file