diff --git a/php/utils.php b/php/utils.php
index <HASH>..<HASH> 100644
--- a/php/utils.php
+++ b/php/utils.php
@@ -25,7 +25,7 @@ function load_dependencies() {
 
 	if ( !$has_autoload ) {
 		fputs( STDERR, "Internal error: Can't find Composer autoloader.\n" );
-		exit(2);
+		exit(3);
 	}
 
 	include WP_CLI_ROOT . 'Spyc.php';
change exit code when Composer packages aren't installed

2 is a reserved exit code:

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