diff --git a/cli/commands.go b/cli/commands.go
index 98875bff..a5f41c90 100644
--- a/cli/commands.go
+++ b/cli/commands.go
@@ -355,5 +355,9 @@ func GetKubeConfig(c *cli.Context) error {
 }
 
 func Shell(c *cli.Context) error {
+	if c.String("shell") != "bash" {
+		return fmt.Errorf("%s is not supported. Only bash is supported", c.String("shell"))
+	}
+
 	return bashShell(c.String("name"), c.String("command"))
 }
diff --git a/main.go b/main.go
index 8d59f319..51386f3d 100644
--- a/main.go
+++ b/main.go
@@ -59,6 +59,11 @@ func main() {
 					Name:  "command, c",
 					Usage: "Run a shell command in the context of the cluster",
 				},
+				cli.StringFlag{
+					Name:  "shell, s",
+					Value: "bash",
+					Usage: "Sub shell type. Only bash is supported. (default bash)",
+				},
 			},
 			Action: run.Shell,
 		},