diff --git a/requirements.txt b/requirements.txt
index 8b057be..2325eef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -61,7 +61,7 @@ plac==0.9.6
 pluggy==0.8.0
 preshed==2.0.1
 prompt-toolkit==2.0.7
-protobuf==3.6.1
+protobuf==3.18.3
 psycopg2==2.7.6.1
 ptyprocess==0.6.0
 py==1.7.0