diff --git a/configure.ac b/configure.ac
index f15a535..5470863 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,7 +81,7 @@ AS_IF([test "${with_ssl} ${with_http2}" == "check check"], [
        AC_CHECK_LIB([nghttp2], [nghttp2_session_client_new], [
             LIBS="-lnghttp2 $LIBS"
             AC_DEFINE([HAVE_LIBNGHTTP2], [1], [Define if you have the nghttp2 library (-lnghttp2).])
-            AC_CHECK_FUNCS([nghttp2_http2_strerror nghttp2_session_callbacks_set_error_callback])
+            AC_CHECK_FUNCS([nghttp2_http2_strerror nghttp2_session_callbacks_set_error_callback nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation])
             AC_CHECK_DECLS([NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL],
                      [], [], [[#include <nghttp2/nghttp2.h>]])
             ],
diff --git a/src/crawler.c b/src/crawler.c
index 8d9ef1b..0526384 100644
--- a/src/crawler.c
+++ b/src/crawler.c
@@ -1133,8 +1133,16 @@ static int http2_create_session(mcrawler_url *u) {
 	memset(session_data, 0, sizeof(http2_session_data));
 	u->http2_session = session_data;
 
-	nghttp2_session_client_new(&session_data->session, callbacks, u);
+	// options
+	nghttp2_option *option;
+	nghttp2_option_new(&option);
+#ifdef HAVE_NGHTTP2_OPTION_SET_NO_RFC9113_LEADING_AND_TRAILING_WS_VALIDATION
+	nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation(option, 1);
+#endif
+
+	nghttp2_session_client_new2(&session_data->session, callbacks, u, option);
 	nghttp2_session_callbacks_del(callbacks);
+	nghttp2_option_del(option);
 
 	// TCP NODELAY
 	int val = 1;