diff --git a/client.go b/client.go
index 815b0ca5..dbca164a 100644
--- a/client.go
+++ b/client.go
@@ -399,7 +399,7 @@ func (d *Dialer) DialContext(ctx context.Context, urlStr string, requestHeader h
 		}
 	}
 
-	if resp.StatusCode != 101 ||
+	if resp.StatusCode != http.StatusSwitchingProtocols ||
 		!tokenListContainsValue(resp.Header, "Upgrade", "websocket") ||
 		!tokenListContainsValue(resp.Header, "Connection", "upgrade") ||
 		resp.Header.Get("Sec-Websocket-Accept") != computeAcceptKey(challengeKey) {
diff --git a/proxy.go b/proxy.go
index 80f55d1e..b6af21f9 100644
--- a/proxy.go
+++ b/proxy.go
@@ -75,7 +75,7 @@ func (hpd *httpProxyDialer) Dial(network string, addr string) (net.Conn, error)
 		return nil, err
 	}
 
-	if resp.StatusCode != 200 {
+	if resp.StatusCode != http.StatusOK {
 		if err := conn.Close(); err != nil {
 			log.Printf("httpProxyDialer: failed to close connection: %v", err)
 		}