diff --git a/requirements.txt b/requirements.txt
index 1a3e1e2..596d5e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ numpy==1.18.1
 oauth2client==3.0.0
 pandas==1.0.1
 passlib==1.7.2
-protobuf==3.11.2
+protobuf==3.18.3
 psycopg2==2.8.4
 pyasn1==0.4.8
 pyasn1-modules==0.2.8