diff --git a/src/htsp_server.c b/src/htsp_server.c
index 7f1e3b05..b19d34ef 100644
--- a/src/htsp_server.c
+++ b/src/htsp_server.c
@@ -68,7 +68,7 @@
 
 static void *htsp_server, *htsp_server_2;
 
-#define HTSP_PROTO_VERSION 19
+#define HTSP_PROTO_VERSION 20
 
 #define HTSP_ASYNC_OFF  0x00
 #define HTSP_ASYNC_ON   0x01