diff --git a/demo/requirements.txt b/demo/requirements.txt
index 25071ad..43e0cff 100644
--- a/demo/requirements.txt
+++ b/demo/requirements.txt
@@ -1,3 +1,3 @@
 hamutils==0.2.1
-protobuf==3.19.3
+protobuf==3.19.4
 tabulate==0.8.9