diff --git a/composer.json b/composer.json
index b8203be..5c75929 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
 	"require": {
 		"php": ">=5.3.0",
 		"ext-pcntl": "*",
-		"monolog/monolog": ">=1.2.0",
+		"monolog/monolog": "1.24.0",
 		"kamisama/monolog-init": ">=0.1.1"
 	},
 	"autoload": {