diff --git a/internal/runner/options.go b/internal/runner/options.go
index a5869d6..6094c7a 100644
--- a/internal/runner/options.go
+++ b/internal/runner/options.go
@@ -31,6 +31,7 @@ type Options struct {
 	Silent         bool
 	Sandbox        bool
 	MaxFileSize    int
+	HTTP1Only      bool
 }
 
 // ParseOptions parses the command line options for application
@@ -56,7 +57,8 @@ func ParseOptions() *Options {
 	flag.BoolVar(&options.Version, "version", false, "Show version of the software")
 	flag.BoolVar(&options.Silent, "silent", false, "Show only results in the output")
 	flag.BoolVar(&options.Sandbox, "sandbox", false, "Enable sandbox mode")
-	flag.IntVar(&options.MaxFileSize, "max-file-size", 50, "Max Upload File Size")
+	flag.IntVar(&options.MaxFileSize, "max-file-size", 50, "Max Upload File Size in Mb")
+	flag.BoolVar(&options.HTTP1Only, "http1", false, "Enable only HTTP1")
 
 	flag.Parse()
 
diff --git a/internal/runner/runner.go b/internal/runner/runner.go
index 5806044..88fe753 100644
--- a/internal/runner/runner.go
+++ b/internal/runner/runner.go
@@ -59,6 +59,7 @@ func New(options *Options) (*Runner, error) {
 		Verbose:           r.options.Verbose,
 		Sandbox:           r.options.Sandbox,
 		MaxFileSize:       r.options.MaxFileSize,
+		HTTP1Only:         r.options.HTTP1Only,
 	})
 	if err != nil {
 		return nil, err
diff --git a/pkg/httpserver/httpserver.go b/pkg/httpserver/httpserver.go
index 72da466..be44567 100644
--- a/pkg/httpserver/httpserver.go
+++ b/pkg/httpserver/httpserver.go
@@ -1,6 +1,7 @@
 package httpserver
 
 import (
+	"crypto/tls"
 	"errors"
 	"net/http"
 	"os"
@@ -23,7 +24,8 @@ type Options struct {
 	BasicAuthReal     string
 	Verbose           bool
 	Sandbox           bool
-	MaxFileSize       int // 50Mb
+	MaxFileSize       int
+	HTTP1Only         bool
 }
 
 // HTTPServer instance
@@ -59,9 +61,20 @@ func New(options *Options) (*HTTPServer, error) {
 	return &h, nil
 }
 
+func (t *HTTPServer) makeHTTPServer(tlsConfig *tls.Config) *http.Server {
+	httpServer := &http.Server{Addr: t.options.ListenAddress}
+	if t.options.HTTP1Only {
+		httpServer.TLSNextProto = make(map[string]func(*http.Server, *tls.Conn, http.Handler))
+	}
+	httpServer.TLSConfig = tlsConfig
+	httpServer.Handler = t.layers
+	return httpServer
+}
+
 // ListenAndServe requests over http
 func (t *HTTPServer) ListenAndServe() error {
-	return http.ListenAndServe(t.options.ListenAddress, t.layers)
+	httpServer := t.makeHTTPServer(nil)
+	return httpServer.ListenAndServe()
 }
 
 // ListenAndServeTLS requests over https
@@ -73,11 +86,7 @@ func (t *HTTPServer) ListenAndServeTLS() error {
 		if err != nil {
 			return err
 		}
-		httpServer := &http.Server{
-			Addr:      t.options.ListenAddress,
-			TLSConfig: tlsConfig,
-		}
-		httpServer.Handler = t.layers
+		httpServer := t.makeHTTPServer(tlsConfig)
 		return httpServer.ListenAndServeTLS("", "")
 	}
 	return http.ListenAndServeTLS(t.options.ListenAddress, t.options.Certificate, t.options.CertificateKey, t.layers)