diff --git a/back-end/requirements.txt b/back-end/requirements.txt
index 51d13194..c4a23b2d 100644
--- a/back-end/requirements.txt
+++ b/back-end/requirements.txt
@@ -40,7 +40,7 @@ mongoengine==0.18.2
 msgpack==0.6.2
 oauth2client==3.0.0
 oauthlib==3.1.0
-protobuf==3.10.0
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pycryptodome==3.6.6