diff --git a/composer.json b/composer.json
index f2dba2a27..4ef79ac45 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
   },
   "config": {
     "platform": {
-      "php": "7.2.0"
+      "php": "7.1.3"
     },
     "vendor-dir": "lib",
     "preferred-install": {