diff --git a/src/htsp.c b/src/htsp.c
index fae01287..9d67e348 100644
--- a/src/htsp.c
+++ b/src/htsp.c
@@ -48,7 +48,7 @@
 
 static void *htsp_server;
 
-#define HTSP_PROTO_VERSION 3
+#define HTSP_PROTO_VERSION 4
 
 #define HTSP_PRIV_MASK (ACCESS_STREAMING)