diff --git a/prometheus/templates/prometheus.systemd b/prometheus/templates/prometheus.systemd
index a31c49d4..3c90c377 100644
--- a/prometheus/templates/prometheus.systemd
+++ b/prometheus/templates/prometheus.systemd
@@ -9,6 +9,7 @@ User={{ prometheus_user }}
 Group={{ prometheus_user }}
 EnvironmentFile=/etc/default/prometheus
 ExecStart={{ prometheus_cmd }} $PROMETHEUS_STARTUP_OPTS
+ExecReload=/bin/kill -HUP $MAINPID
 Restart=on-failure
 
 [Install]