diff --git a/composer.json b/composer.json
index 5969ee9..7590320 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "symfony/options-resolver": "^2.7 || ^3.0 || ^4.0 || ^5.0",
         "symfony/serializer": "^2.7 || ^3.0 || ^4.0 || ^5.0",
         "symfony/yaml": "^2.7 || ^3.0 || ^4.0 || ^5.0",
-        "monolog/monolog": "^1.13"
+        "monolog/monolog": "^1.13 || ^2.0"
     },
     "autoload": {
         "psr-4": {