diff --git a/templates/prometheus-postgres-exporter/configMapGrafanaDashboardPostgresExporter.yaml b/templates/prometheus-postgres-exporter/configMapGrafanaDashboardPostgresExporter.yaml
index c7c77f2..d4e8e10 100644
--- a/templates/prometheus-postgres-exporter/configMapGrafanaDashboardPostgresExporter.yaml
+++ b/templates/prometheus-postgres-exporter/configMapGrafanaDashboardPostgresExporter.yaml
@@ -14,7 +14,7 @@ metadata:
   name: {{ include "prometheus-postgres-exporter.fullname" . }}-grafana-dashboard-postgres-exporter
   namespace: {{ .Release.Namespace }}
 data:
-  postgresExporter.yaml: |-
+  postgresExporter.json: |-
     {{`{
       "__inputs": [
         {
diff --git a/unittests/configMaps/grafanaDashboardPostgresExporter.yaml b/unittests/configMaps/grafanaDashboardPostgresExporter.yaml
index 63bcf2d..b3bcd51 100644
--- a/unittests/configMaps/grafanaDashboardPostgresExporter.yaml
+++ b/unittests/configMaps/grafanaDashboardPostgresExporter.yaml
@@ -36,7 +36,7 @@ tests:
         grafana_dashboard: "1"
         helm.sh/chart: prometheus-postgres-exporter-0.1.0
   - exists:
-      path: data["postgresExporter.yaml"]
+      path: data["postgresExporter.json"]
 
 - it: Test custom annotations and labels
   set: