diff --git a/composer.json b/composer.json
index 580533c..c2849fd 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
   ],
   "require": {
     "php": "^7.1.3",
-    "monolog/monolog": "~1.11",
+    "monolog/monolog": "^1.11|^2.0",
     "symfony/console": "^4.0",
     "symfony/filesystem": "^4.0",
     "symfony/event-dispatcher": "^4.0",