diff --git a/doh-client/google.go b/doh-client/google.go
index e1f0454..d985e8a 100644
--- a/doh-client/google.go
+++ b/doh-client/google.go
@@ -88,7 +88,7 @@ func (c *Client) handlerFuncGoogle(w dns.ResponseWriter, r *dns.Msg, isTCP bool)
 		return
 	}
 	req.Header.Set("Accept", "application/json")
-	req.Header.Set("User-Agent", "DNS-over-HTTPS/1.0 (+https://github.com/m13253/dns-over-https)")
+	req.Header.Set("User-Agent", "DNS-over-HTTPS/1.1 (+https://github.com/m13253/dns-over-https)")
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		log.Println(err)
diff --git a/doh-client/ietf.go b/doh-client/ietf.go
index 24e3efd..9fac35f 100644
--- a/doh-client/ietf.go
+++ b/doh-client/ietf.go
@@ -140,7 +140,7 @@ func (c *Client) handlerFuncIETF(w dns.ResponseWriter, r *dns.Msg, isTCP bool) {
 		req.Header.Set("Content-Type", "application/dns-udpwireformat")
 	}
 	req.Header.Set("Accept", "application/dns-udpwireformat")
-	req.Header.Set("User-Agent", "DNS-over-HTTPS/1.0 (+https://github.com/m13253/dns-over-https)")
+	req.Header.Set("User-Agent", "DNS-over-HTTPS/1.1 (+https://github.com/m13253/dns-over-https)")
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		log.Println(err)
diff --git a/doh-server/server.go b/doh-server/server.go
index f814b8b..5b4542a 100644
--- a/doh-server/server.go
+++ b/doh-server/server.go
@@ -82,8 +82,8 @@ func (s *Server) Start() error {
 }
 
 func (s *Server) handlerFunc(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Server", "DNS-over-HTTPS/1.0 (+https://github.com/m13253/dns-over-https)")
-	w.Header().Set("X-Powered-By", "DNS-over-HTTPS/1.0 (+https://github.com/m13253/dns-over-https)")
+	w.Header().Set("Server", "DNS-over-HTTPS/1.1 (+https://github.com/m13253/dns-over-https)")
+	w.Header().Set("X-Powered-By", "DNS-over-HTTPS/1.1 (+https://github.com/m13253/dns-over-https)")
 
 	if r.Form == nil {
 		const maxMemory = 32 << 20 // 32 MB