diff --git a/composer.json b/composer.json
index a26651b..3f81cbe 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
   "require": {
     "php": ">=5.6.0",
     "ext-pdo": "*",
-    "ipl/stdlib": ">=0.5.0"
+    "ipl/stdlib": ">=0.9.0"
   },
   "autoload": {
     "psr-4": {