diff --git a/README.md b/README.md
index 5d78972..a0b98e5 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ Image type detection library for PHP.
 
 ## Requirements
 
-* PHP 7.2+
+* PHP 7.1+
 
 ## Installation