diff --git a/lib/includes/nghttp2/nghttp2.h b/lib/includes/nghttp2/nghttp2.h
index 1d5ce4c6..a725a12b 100644
--- a/lib/includes/nghttp2/nghttp2.h
+++ b/lib/includes/nghttp2/nghttp2.h
@@ -40,7 +40,7 @@ extern "C" {
  *
  * The protocol version identification of this library supports.
  */
-#define NGHTTP2_PROTO_VERSION_ID "HTTP-draft-08/2.0"
+#define NGHTTP2_PROTO_VERSION_ID "HTTP-draft-09/2.0"
 /**
  * @macro
  *
diff --git a/tests/nghttp2_npn_test.c b/tests/nghttp2_npn_test.c
index d7d6f7b9..5bb10fdc 100644
--- a/tests/nghttp2_npn_test.c
+++ b/tests/nghttp2_npn_test.c
@@ -33,7 +33,7 @@ static void http2(void)
 {
   const unsigned char p[] = {
     8, 'h', 't', 't', 'p', '/', '1', '.', '1',
-    17, 'H', 'T', 'T', 'P', '-', 'd', 'r', 'a', 'f', 't', '-', '0', '8', '/',
+    17, 'H', 'T', 'T', 'P', '-', 'd', 'r', 'a', 'f', 't', '-', '0', '9', '/',
     '2', '.', '0',
     6, 's', 'p', 'd', 'y', '/', '3'
   };