diff --git a/composer.json b/composer.json
index b4a9b3e..b52286b 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
 		"php": "^5.3.0 || ^7.0",
 		"ext-pcre": "*",
 		"intervention/httpauth": "~2.0",
-		"marcusschwarz/lesserphp": "0.5.2",
+		"marcusschwarz/lesserphp": "^0.5.1",
 		"monolog/monolog": "~1.1|~2.0",
 		"mrclay/jsmin-php": "~2",
 		"mrclay/props-dic": "^2.2|^3.0",