diff --git a/app/dns/server/server.go b/app/dns/server/server.go
index a2f6bedc..093c4724 100644
--- a/app/dns/server/server.go
+++ b/app/dns/server/server.go
@@ -70,15 +70,15 @@ func NewCacheServer(ctx context.Context, config *dns.Config) (*CacheServer, erro
 	return server, nil
 }
 
-func (CacheServer) Interface() interface{} {
+func (*CacheServer) Interface() interface{} {
 	return (*dns.Server)(nil)
 }
 
-func (CacheServer) Start() error {
+func (*CacheServer) Start() error {
 	return nil
 }
 
-func (CacheServer) Close() {}
+func (*CacheServer) Close() {}
 
 // Private: Visible for testing.
 func (v *CacheServer) GetCached(domain string) []net.IP {
diff --git a/app/proxyman/outbound/outbound.go b/app/proxyman/outbound/outbound.go
index a672bc0d..bd8b9cf1 100644
--- a/app/proxyman/outbound/outbound.go
+++ b/app/proxyman/outbound/outbound.go
@@ -22,13 +22,13 @@ func New(ctx context.Context, config *proxyman.OutboundConfig) (*DefaultOutbound
 	}, nil
 }
 
-func (DefaultOutboundHandlerManager) Interface() interface{} {
+func (*DefaultOutboundHandlerManager) Interface() interface{} {
 	return (*proxyman.OutboundHandlerManager)(nil)
 }
 
-func (DefaultOutboundHandlerManager) Start() error { return nil }
+func (*DefaultOutboundHandlerManager) Start() error { return nil }
 
-func (DefaultOutboundHandlerManager) Close() {}
+func (*DefaultOutboundHandlerManager) Close() {}
 
 func (v *DefaultOutboundHandlerManager) GetDefaultHandler() proxyman.OutboundHandler {
 	v.RLock()