diff --git a/server.env b/server.env
index abea91f..8f996fc 100644
--- a/server.env
+++ b/server.env
@@ -31,6 +31,12 @@ DRONE_HTTP_STS_PRELOAD=true
 # Prometheus anonymous access
 DRONE_PROMETHEUS_ANONYMOUS_ACCESS=true
 
+# Zombie build reaper interval (24h by default)
+DRONE_CLEANUP_INTERVAL=60m
+# reaper kills permanently (pending,running) stuck jobs
+DRONE_CLEANUP_DISABLED=false
+DRONE_CLEANUP_DEADLINE_RUNNING=8h
+
 # Registration settings
 DRONE_OPEN=true
 DRONE_REGISTRATION_CLOSED=false