diff --git a/backend/requirements.txt b/backend/requirements.txt
index 8e3c8aa..37c06c7 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -45,7 +45,7 @@ Pint==0.9
 pipenv==2018.11.26
 plac==0.9.6
 preshed==2.0.1
-protobuf==3.10.0
+protobuf==3.18.3
 py-bcrypt==0.4
 pyasn1==0.4.7
 pyasn1-modules==0.2.7