[THRIFT-5760] Update minimal version of php
diff --git a/lib/php/README.md b/lib/php/README.md
index e7144fe..4bbc967 100644
--- a/lib/php/README.md
+++ b/lib/php/README.md
@@ -21,7 +21,7 @@
# Using Thrift with PHP
-Thrift requires PHP 5. Thrift makes as few assumptions about your PHP
+Thrift requires PHP 7.1 Thrift makes as few assumptions about your PHP
environment as possible while trying to make some more advanced PHP
features (i.e. APCu cacheing using asbolute path URLs) as simple as possible.