diff --git a/02-composer.md b/02-composer.md
index 47ff793..0dd1b3e 100644
--- a/02-composer.md
+++ b/02-composer.md
@@ -26,7 +26,7 @@ Add the following content to the file:
         }
     ],
     "require": {
-        "php": ">=5.5.0"
+        "php": ">=7.0.0"
     },
     "autoload": {
         "psr-4": {