diff --git a/composer.json b/composer.json
index 49591d7..22f4185 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "exclude": ["/doc", "/*.json", "/.git", "/*.md"]
     },
     "require": {
-        "php": ">=7.0.0"
+        "php": ">=5.6.28"
     },
     "autoload": {
         "psr-4": {"Lib\\": ""}