diff --git a/backend/python/requirements.txt b/backend/python/requirements.txt
index 722c18e..e6f56d5 100644
--- a/backend/python/requirements.txt
+++ b/backend/python/requirements.txt
@@ -8,7 +8,7 @@ typing==3.7.4
 Flask==1.1.1
 base58==1.0.3
 GitPython==2.1.12
-protobuf==3.9.0
+protobuf==3.18.3
 hypothesis==4.31.0
 matplotlib==3.1.1
 pytest==5.0.1