diff --git a/charts/prometheus-exporter/templates/_helpers.tpl b/charts/prometheus-exporter/templates/_helpers.tpl
index c3b96fd..3e1a497 100644
--- a/charts/prometheus-exporter/templates/_helpers.tpl
+++ b/charts/prometheus-exporter/templates/_helpers.tpl
@@ -81,8 +81,10 @@ Create the name of the service account to use
     periodSeconds: 5
   resources:
     {{- toYaml .Values.resources | nindent 4 }}
-  {{- with .Values.volumeMounts }}
   volumeMounts:
+    - name: metric-volume
+      mountPath: /app/var/metrics/
+  {{- with .Values.volumeMounts }}
     {{- toYaml . | nindent 4 }}
   {{- end }}
   {{- with .Values.env }}
diff --git a/charts/prometheus-exporter/templates/deployment.yaml b/charts/prometheus-exporter/templates/deployment.yaml
index da0d579..4991942 100644
--- a/charts/prometheus-exporter/templates/deployment.yaml
+++ b/charts/prometheus-exporter/templates/deployment.yaml
@@ -36,6 +36,8 @@ spec:
         - name: nginx-config-volume
           configMap:
             name: {{ include "prometheus-exporter.fullname" . }}-nginx-config
+        - name: metrics-volume
+          emptyDir: {}
       {{- with .Values.volumes }}
         {{- toYaml . | nindent 8 }}
       {{- end }}