diff --git a/main.go b/main.go
index 2dabaa4..c928412 100644
--- a/main.go
+++ b/main.go
@@ -21,7 +21,7 @@ func main() {
 		cli.StringFlag{
 			Name:   "ssh-key",
 			Usage:  "private ssh key",
-			EnvVar: "PLUGIN_SSH_KEY,SSH_KEY",
+			EnvVar: "PLUGIN_SSH_KEY,PLUGIN_KEY,SSH_KEY",
 		},
 		cli.StringFlag{
 			Name:   "user",