diff --git a/php/psalm.xml b/php/psalm.xml
index 576d82d2..dae6f935 100644
--- a/php/psalm.xml
+++ b/php/psalm.xml
@@ -6,6 +6,7 @@
 	errorBaseline="psalm-baseline.xml"
 	findUnusedBaselineEntry="true"
 	findUnusedCode="false"
+	errorLevel="2"
 >
 	<projectFiles>
 		<directory name="templates"/>