diff --git a/DnsServerCore/www/index.html b/DnsServerCore/www/index.html
index 0cad6118..35a03f5b 100644
--- a/DnsServerCore/www/index.html
+++ b/DnsServerCore/www/index.html
@@ -838,6 +838,16 @@
                                                     <div class="col-sm-offset-3 col-sm-8" style="padding-top: 5px;">Max number of days to keep the log files. Log files older than the specified number of days will be deleted automatically.</div>
                                                 </div>
 
+                                                <div class="form-group">
+                                                    <label for="txtMaxStatFileDays" class="col-sm-3 control-label">Max Stat File Days</label>
+                                                    <div class="col-sm-6">
+                                                        <input type="number" class="form-control" id="txtMaxStatFileDays" placeholder="Max Days" style="width: 100px; display: inline;">
+                                                        <span>days (recommended 365, set 0 to disable auto delete)</span>
+                                                    </div>
+
+                                                    <div class="col-sm-offset-3 col-sm-8" style="padding-top: 5px;">Max number of days to keep the dashboard stats. Stat files older than the specified number of days will be deleted automatically.</div>
+                                                </div>
+
                                                 <div>Warning! Enabling query logging will significantly increase the log file size and use up disk space.</div>
                                             </div>
 
diff --git a/DnsServerCore/www/js/main.js b/DnsServerCore/www/js/main.js
index 53f1c701..fe7173a9 100644
--- a/DnsServerCore/www/js/main.js
+++ b/DnsServerCore/www/js/main.js
@@ -678,6 +678,7 @@ function loadDnsSettings() {
             $("#chkUseLocalTime").prop("checked", responseJSON.response.useLocalTime);
             $("#txtLogFolderPath").val(responseJSON.response.logFolder);
             $("#txtMaxLogFileDays").val(responseJSON.response.maxLogFileDays);
+            $("#txtMaxStatFileDays").val(responseJSON.response.maxStatFileDays);
 
             $("#chkAllowRecursion").prop("checked", responseJSON.response.allowRecursion);
             $("#chkAllowRecursionOnlyForPrivateNetworks").prop('disabled', !responseJSON.response.allowRecursion);
@@ -868,6 +869,7 @@ function saveDnsSettings() {
     var useLocalTime = $("#chkUseLocalTime").prop('checked');
     var logFolder = $("#txtLogFolderPath").val();
     var maxLogFileDays = $("#txtMaxLogFileDays").val();
+    var maxStatFileDays = $("#txtMaxStatFileDays").val();
 
     var allowRecursion = $("#chkAllowRecursion").prop('checked');
     var allowRecursionOnlyForPrivateNetworks = $("#chkAllowRecursionOnlyForPrivateNetworks").prop('checked');
@@ -960,7 +962,7 @@ function saveDnsSettings() {
         url: "/api/setDnsSettings?token=" + token + "&dnsServerDomain=" + dnsServerDomain + "&dnsServerLocalEndPoints=" + encodeURIComponent(dnsServerLocalEndPoints)
             + "&webServiceLocalAddresses=" + encodeURIComponent(webServiceLocalAddresses) + "&webServiceHttpPort=" + webServiceHttpPort + "&webServiceEnableTls=" + webServiceEnableTls + "&webServiceHttpToTlsRedirect=" + webServiceHttpToTlsRedirect + "&webServiceTlsPort=" + webServiceTlsPort + "&webServiceTlsCertificatePath=" + encodeURIComponent(webServiceTlsCertificatePath) + "&webServiceTlsCertificatePassword=" + encodeURIComponent(webServiceTlsCertificatePassword)
             + "&enableDnsOverHttp=" + enableDnsOverHttp + "&enableDnsOverTls=" + enableDnsOverTls + "&enableDnsOverHttps=" + enableDnsOverHttps + "&dnsTlsCertificatePath=" + encodeURIComponent(dnsTlsCertificatePath) + "&dnsTlsCertificatePassword=" + encodeURIComponent(dnsTlsCertificatePassword)
-            + "&preferIPv6=" + preferIPv6 + "&enableLogging=" + enableLogging + "&logQueries=" + logQueries + "&useLocalTime=" + useLocalTime + "&logFolder=" + encodeURIComponent(logFolder) + "&maxLogFileDays=" + maxLogFileDays
+            + "&preferIPv6=" + preferIPv6 + "&enableLogging=" + enableLogging + "&logQueries=" + logQueries + "&useLocalTime=" + useLocalTime + "&logFolder=" + encodeURIComponent(logFolder) + "&maxLogFileDays=" + maxLogFileDays + "&maxStatFileDays=" + maxStatFileDays
             + "&allowRecursion=" + allowRecursion + "&allowRecursionOnlyForPrivateNetworks=" + allowRecursionOnlyForPrivateNetworks + "&randomizeName=" + randomizeName
             + "&serveStale=" + serveStale + "&serveStaleTtl=" + serveStaleTtl + "&cachePrefetchEligibility=" + cachePrefetchEligibility + "&cachePrefetchTrigger=" + cachePrefetchTrigger + "&cachePrefetchSampleIntervalInMinutes=" + cachePrefetchSampleIntervalInMinutes + "&cachePrefetchSampleEligibilityHitsPerHour=" + cachePrefetchSampleEligibilityHitsPerHour
             + proxy + "&forwarders=" + encodeURIComponent(forwarders) + "&forwarderProtocol=" + forwarderProtocol + "&blockListUrls=" + encodeURIComponent(blockListUrls) + "&blockListUpdateIntervalHours=" + blockListUpdateIntervalHours,