diff --git a/backend/requirements.txt b/backend/requirements.txt
index 73abd19..82799a8 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -33,7 +33,7 @@ more-itertools==7.2.0
 oauth2client==3.0.0
 passlib==1.7.1
 pprint==0.1
-protobuf==3.10.0
+protobuf==3.18.3
 psycopg2==2.8.3
 pyasn1==0.4.7
 pyasn1-modules==0.2.7