diff --git a/jsonnet/kube-prometheus/components/grafana.libsonnet b/jsonnet/kube-prometheus/components/grafana.libsonnet
index 170a81699a44554c2da1d2f3497e0ad0ca4bb72f..06d5bef3de3516081e283e1615e5b92eb5b9aa02 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: [{