diff --git a/sonar-project.properties b/sonar-project.properties
index 5af0ed9f..bf7cbfa4 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -12,6 +12,11 @@ sonar.issues.defaultAssigneeLogin=LayZeeDK@github
 # Scan
 sonar.sourceEncoding=UTF-8
 
+# Block the scan step on the quality gate verdict instead of passing as soon as
+# the report uploads. Without this the GitHub check is green whatever the gate
+# says — it was ERROR on `main` for years before anyone noticed.
+sonar.qualitygate.wait=true
+
 # comma-separated paths to directories containing source files
 sonar.sources=e2e,packages,tools
 # configure the files that should be completely ignored by the analysis