diff --git a/cron.php b/cron.php
index 6fdc7cb24d..4473dba82c 100644
--- a/cron.php
+++ b/cron.php
@@ -30,6 +30,21 @@
  *
  */
 
+// Show warning if a PHP version below 5.4.0 is used
+if (version_compare(PHP_VERSION, '5.4.0') === -1) {
+	echo 'This version of Nextcloud requires at least PHP 5.4.0<br/>';
+	echo 'You are currently running ' . PHP_VERSION . '. Please update your PHP version.';
+	return;
+}
+
+// Show warning if PHP 7.1 is used as Nextcloud is not compatible with PHP 7.1 for now
+// @see https://github.com/nextcloud/docker-ci/issues/10
+if (version_compare(PHP_VERSION, '7.1.0') !== -1) {
+	echo 'This version of Nextcloud is not compatible with PHP 7.1.<br/>';
+	echo 'You are currently running ' . PHP_VERSION . '.';
+	return;
+}
+
 try {
 
 	require_once __DIR__ . '/lib/base.php';