diff --git a/project-manager/main.go b/project-manager/main.go
index 28c1113..580da02 100644
--- a/project-manager/main.go
+++ b/project-manager/main.go
@@ -53,7 +53,7 @@ var ListProjects = &cobra.Command{
 
 var RootCmd = &cobra.Command{
 	Use:  "pee",
-	Args: cobra.MaximumNArgs(1),
+	Args: cobra.ExactArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
 		ExecuteProjectEnv(args[0])
 	},