diff --git a/charts/promtail/Chart.yaml b/charts/promtail/Chart.yaml
index ff14820528..fa9bec5146 100644
--- a/charts/promtail/Chart.yaml
+++ b/charts/promtail/Chart.yaml
@@ -3,7 +3,7 @@ name: promtail
 description: Promtail is an agent which ships the contents of local logs to a Loki instance
 type: application
 appVersion: 2.9.3
-version: 6.15.5
+version: 6.15.6
 home: https://grafana.com/loki
 sources:
   - https://github.com/grafana/loki
diff --git a/charts/promtail/README.md b/charts/promtail/README.md
index 19b9a14b59..eae89b427e 100644
--- a/charts/promtail/README.md
+++ b/charts/promtail/README.md
@@ -1,6 +1,6 @@
 # promtail
 
-![Version: 6.15.5](https://img.shields.io/badge/Version-6.15.5-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.9.3](https://img.shields.io/badge/AppVersion-2.9.3-informational?style=flat-square)
+![Version: 6.15.6](https://img.shields.io/badge/Version-6.15.6-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.9.3](https://img.shields.io/badge/AppVersion-2.9.3-informational?style=flat-square)
 
 Promtail is an agent which ships the contents of local logs to a Loki instance
 
diff --git a/charts/promtail/values.yaml b/charts/promtail/values.yaml
index b483599002..47a737df3e 100644
--- a/charts/promtail/values.yaml
+++ b/charts/promtail/values.yaml
@@ -291,7 +291,7 @@ serviceMonitor:
     # namespace:
     rules: []
     #  - alert: PromtailRequestErrors
-    #    expr: 100 * sum(rate(promtail_request_duration_seconds_count{status_code=~"5..|failed"}[1m])) by (namespace, job, route, instance) / sum(rate(promtail_request_duration_seconds_count[1m])) by (namespace, job, route, instance) > 10
+    #    expr: 100 * sum(rate(promtail_request_duration_seconds_count{status_code=~"5..|failed|-1"}[1m])) by (namespace, job, route, instance) / sum(rate(promtail_request_duration_seconds_count[1m])) by (namespace, job, route, instance) > 10
     #    for: 5m
     #    labels:
     #      severity: critical