diff --git a/backend-v2/requirements.txt b/backend-v2/requirements.txt
index db5a361..3b5050e 100644
--- a/backend-v2/requirements.txt
+++ b/backend-v2/requirements.txt
@@ -16,7 +16,7 @@ Markdown==3.0.1
 mock==2.0.0
 numpy==1.15.4
 pbr==5.1.1
-protobuf==3.6.1
+protobuf==3.18.3
 pyyaml>=4.2b1
 scipy==1.1.0
 six==1.11.0