diff --git a/jsonnet/kube-prometheus/alertmanager/alertmanager.libsonnet b/jsonnet/kube-prometheus/alertmanager/alertmanager.libsonnet
index a6d9e8e62caedda894eab211083bb01e01a4d591..e109b0adf7294867cf60b9a4650acce676c66ba4 100644
--- a/jsonnet/kube-prometheus/alertmanager/alertmanager.libsonnet
+++ b/jsonnet/kube-prometheus/alertmanager/alertmanager.libsonnet
@@ -5,7 +5,7 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
     namespace: 'default',
 
     versions+:: {
-      alertmanager: 'v0.15.2',
+      alertmanager: 'v0.15.3',
     },
 
     imageRepos+:: {