diff --git a/requirements.txt b/requirements.txt
index 4a7cdcf..656c238 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ numpy==1.18.4
 objgraph==3.4.1
 Paste==3.4.0
 portend==2.6
-protobuf==3.11.3
+protobuf==3.18.3
 psutil==5.7.0
 psycopg2==2.8.5
 pycparser==2.20