diff --git a/composer.json b/composer.json
index 02747f8..dea85be 100755
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=7.0.0",
-        "laravel/lumen-framework": "5.4.*",
+        "laravel/lumen-framework": "5.5.*",
         "symfony/process" : "3.*",
         "intervention/image": "^2.4",
         "intervention/imagecache": "^2.3",