diff --git a/jupyter_client/_version.py b/jupyter_client/_version.py
index 3101ad82..411f70c0 100644
--- a/jupyter_client/_version.py
+++ b/jupyter_client/_version.py
@@ -16,5 +16,5 @@
 version_info = tuple(parts)
 
 
-protocol_version_info = (5, 3)
+protocol_version_info = (5, 4)
 protocol_version = "%i.%i" % protocol_version_info