diff --git a/jsonnet/kube-prometheus/components/grafana.libsonnet b/jsonnet/kube-prometheus/components/grafana.libsonnet
index 170a8169..06d5bef3 100644
--- a/jsonnet/kube-prometheus/components/grafana.libsonnet
+++ b/jsonnet/kube-prometheus/components/grafana.libsonnet
@@ -73,7 +73,7 @@ function(params) {
     spec: {
       selector: {
         matchLabels: {
-          app.kubernetes.io/name: 'grafana',
+          'app.kubernetes.io/name': 'grafana',
         },
       },
       endpoints: [{