diff --git a/requirements.txt b/requirements.txt
index ab66982..f1b1e8a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ oauth2client==4.1.3
 packaging==20.9
 Pillow==9.0.1
 proto-plus==1.18.1
-protobuf==3.15.6
+protobuf==3.18.3
 psycopg2==2.9.1
 pyasn1==0.4.8
 pyasn1-modules==0.2.8