diff --git a/composer.json b/composer.json
index c12efa26..63205aa4 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "coduo/php-matcher",
     "type": "library",
     "keywords": ["json", "matcher", "tests"],
-    "license": "MIT", 
+    "license": "MIT",
     "authors": [
         {
             "name": "Michał Dąbrowski",
@@ -20,7 +20,7 @@
         "symfony/property-access": "~2.3",
         "symfony/expression-language": "~2.4",
         "doctrine/lexer": "1.0.*",
-        "openlss/lib-array2xml": "0.0.9"
+        "openlss/lib-array2xml": "~0.0.9"
     },
     "require-dev": {
         "phpunit/phpunit": "3.7.*"