diff --git a/src/commands/main.js b/src/commands/main.js
index a51a41c..dea0d7c 100644
--- a/src/commands/main.js
+++ b/src/commands/main.js
@@ -1,5 +1,8 @@
 import program from 'commander';
 import pjson from '../../package.json';
+import chalk from 'chalk';
+
+const availableCommands = ['init', 'list', 'search', 'info'];
 
 program
     .version(pjson.version)
@@ -9,7 +12,16 @@ program
     .command('list', 'List MERN variants')
     .command('search [term]', 'Search for MERN variant')
     .command('info [term]', 'View details of a MERN variant')
-    .parse(process.argv);
+    .arguments('<command>')
+  .parse(process.argv);
+
+if (program.args.length >= 1) {
+	if (!availableCommands.includes(program.args[0])) {
+		program.outputHelp()
+    	console.log(`  ` + chalk.red(`\n  Unknown command ${chalk.yellow(program.args[0])}.`))
+		console.log()
+	}
+}  
 
 if (!program.args.length) {
     program.help();