diff --git a/requirements.txt b/requirements.txt
index 2708cb8..f95b0d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ netaddr==0.8.0
 parsimonious==0.8.1
 pathspec==0.9.0
 platformdirs==2.4.1
-protobuf==3.19.3
+protobuf==3.19.5
 py-solc==3.2.0
 py-solc-x==1.1.1
 pycodestyle==2.8.0