diff --git a/templates/prometheus-postgres-exporter/_deployment.tpl b/templates/prometheus-postgres-exporter/_deployment.tpl
index d28b73e..d7cee1f 100644
--- a/templates/prometheus-postgres-exporter/_deployment.tpl
+++ b/templates/prometheus-postgres-exporter/_deployment.tpl
@@ -53,7 +53,7 @@
 
 {{- define "prometheus-postgres-exporter.deployment.volumeMounts" -}}
 {{- $volumeMounts := dict "volumeMounts" (.Values.deployment.postgresExporter.volumeMounts | default (list) ) }}
-{{- $volumeMounts = merge $volumeMounts (dict "volumeMounts" (list (dict "name" "config.d" "mountPath" "/etc/prometheus-postgres-exporter/config.d" ))) }}
+{{- $volumeMounts = merge $volumeMounts (dict "volumeMounts" (list (dict "name" "config-d" "mountPath" "/etc/prometheus-postgres-exporter/config.d" ))) }}
 {{ toYaml $volumeMounts }}
 {{- end -}}
 
@@ -72,7 +72,7 @@
 {{- $webConfigSecretName = printf "%s-web-config" (include "prometheus-postgres-exporter.fullname" . ) }}
 {{- end }}
 
-{{- $volumes = merge $volumes (dict "volumes" (list (dict "name" "config.d" "projected" (dict "defaultMode" "0444" "sources" (list (dict "secret" (dict "name" $exporterSecretName)) (dict "secret" (dict "name" $webConfigSecretName))))))) }}
+{{- $volumes = merge $volumes (dict "volumes" (list (dict "name" "config-d" "projected" (dict "defaultMode" 444 "sources" (list (dict "secret" (dict "name" $exporterSecretName)) (dict "secret" (dict "name" $webConfigSecretName))))))) }}
 
 {{ toYaml $volumes }}
 
diff --git a/unittests/deployment/deployment.yaml b/unittests/deployment/deployment.yaml
index 887f97e..d562a71 100644
--- a/unittests/deployment/deployment.yaml
+++ b/unittests/deployment/deployment.yaml
@@ -42,13 +42,13 @@ tests:
       path: spec.template.spec.containers[0].volumeMounts
       value:
       - mountPath: /etc/prometheus-postgres-exporter/config.d
-        name: config.d
+        name: config-d
   - equal:
       path: spec.template.spec.volumes
       value:
-      - name: config.d
+      - name: config-d
         projected:
-          defaultMode: "0444"
+          defaultMode: 444
           sources:
           - secret:
               name: prometheus-postgres-exporter-unittest-exporter-config
@@ -143,13 +143,13 @@ tests:
       path: spec.template.spec.containers[0].volumeMounts
       value:
       - mountPath: /etc/prometheus-postgres-exporter/config.d
-        name: config.d
+        name: config-d
   - equal:
       path: spec.template.spec.volumes
       value:
-      - name: config.d
+      - name: config-d
         projected:
-          defaultMode: "0444"
+          defaultMode: 444
           sources:
           - secret:
               name: exporter-config-secret
@@ -165,13 +165,13 @@ tests:
       path: spec.template.spec.containers[0].volumeMounts
       value:
       - mountPath: /etc/prometheus-postgres-exporter/config.d
-        name: config.d
+        name: config-d
   - equal:
       path: spec.template.spec.volumes
       value:
-      - name: config.d
+      - name: config-d
         projected:
-          defaultMode: "0444"
+          defaultMode: 444
           sources:
           - secret:
               name: prometheus-postgres-exporter-unittest-exporter-config