diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index e100ffc..e25fbee 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -3,7 +3,7 @@
 <ruleset name="WordPress Pay Gateway: Buckaroo rules">
 	<config name="minimum_supported_wp_version" value="4.7" />
 
-	<config name="testVersion" value="5.3-" />
+	<config name="testVersion" value="5.6-" />
 
 	<file>.</file>