diff --git a/backend/requirements.txt b/backend/requirements.txt
index f501f2a..13a2259 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -28,7 +28,7 @@ MarkupSafe==1.1.1
 msgpack==0.6.1
 oauth2==1.9.0.post1
 oauthlib==3.1.0
-protobuf==3.15.0
+protobuf==3.18.3
 pyasn1==0.4.7
 pyasn1-modules==0.2.6
 pycparser==2.19