diff --git a/requirements.txt b/requirements.txt
index 1709f77..de80116 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ Jinja2==2.10.1
 kombu==4.6.3
 MarkupSafe==1.1.1
 pep8==1.7.1
-protobuf==3.8.0
+protobuf==3.18.3
 pycparser==2.19
 pydeep==0.4
 pymongo==3.8.0