diff --git a/composer.json b/composer.json
index 0c91437..0d50273 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
     "license": "MIT",
     "require": {
         "php": ">=5.3",
-        "php-flasher/flasher": "^0.4"
+        "php-flasher/flasher": "^0.4.11"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8|^5.0|^6.0|^7.0|^8.0|^9.0"