diff --git a/requirements.txt b/requirements.txt
index 0db3bfa..8294512 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ idna==2.7
 kombu==4.0.2
 mysql-connector-python==8.0.5
 Pillow==6.2.2
-protobuf==3.11.2
+protobuf==3.18.3
 PyPDF2==1.26.0
 pytz==2019.3
 redis==2.10.5