diff --git a/requirements.txt b/requirements.txt
index aba18a1..5091173 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -80,7 +80,7 @@ plac==0.9.6
 pluggy==0.7.1
 preshed==2.0.1
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.18.3
 psutil==5.6.6
 py==1.10.0
 py2neo==4.1.3