diff --git a/backend/requirements.txt b/backend/requirements.txt
index a95decf..ad3bbb2 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -54,7 +54,7 @@ pexpect==4.8.0
 pickleshare==0.7.5
 Pillow==7.1.2
 prompt-toolkit==3.0.4
-protobuf==3.11.3
+protobuf==3.18.3
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8