diff --git a/FastGithub.Dns/DnsServerHostedService.cs b/FastGithub.Dns/DnsServerHostedService.cs
index cf0ed96..76b9dd5 100644
--- a/FastGithub.Dns/DnsServerHostedService.cs
+++ b/FastGithub.Dns/DnsServerHostedService.cs
@@ -169,6 +169,7 @@ namespace FastGithub.Dns
             {
                 this.SetNameServers(this.dnsAddresses);
             }
+            FlushResolverCache();
             return base.StopAsync(cancellationToken);
         }