[THRIFT-5760] Update minimal version of php
diff --git a/doc/install/README.md b/doc/install/README.md
index d073e91..0ebe77c 100644
--- a/doc/install/README.md
+++ b/doc/install/README.md
@@ -32,7 +32,7 @@
     * Gradle 8.4
 * C#: Mono 1.2.4 (and pkg-config to detect it) or Visual Studio 2005+
 * Python 2.6 (including header files for extension modules)
-* PHP 5.0 (optionally including header files for extension modules)
+* PHP 7.1 (optionally including header files for extension modules)
 * Ruby 1.8
     * bundler gem
 * Erlang R12 (R11 works but not recommended)