diff --git a/tests/test_parser.py b/tests/test_parser.py
index f4136d6..8cce866 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -101,6 +101,9 @@ def test_parser_response_1(self):
         self.assertFalse(m.on_chunk_header.called)
         self.assertFalse(m.on_chunk_complete.called)
 
+    def test_parser_response_1b(self):
+        p = httptools.HttpResponseParser(None)
+
         with self.assertRaisesRegex(
                 httptools.HttpParserError,
                 'Expected HTTP/'):
diff --git a/vendor/http-parser b/vendor/http-parser
index 0d0a24e..2343fd6 160000
--- a/vendor/http-parser
+++ b/vendor/http-parser
@@ -1 +1 @@
-Subproject commit 0d0a24e19eb5ba232d2ea8859aba2a7cc6c42bc4
+Subproject commit 2343fd6b5214b2ded2cdcf76de2bf60903bb90cd
diff --git a/vendor/llhttp b/vendor/llhttp
index 3523423..4bfeb62 160000
--- a/vendor/llhttp
+++ b/vendor/llhttp
@@ -1 +1 @@
-Subproject commit 3523423483a61179f47cc7ff0da012fb6f81ec1b
+Subproject commit 4bfeb625ce4961bd539c95593529936503be7db4