diff --git a/backend/requirements.txt b/backend/requirements.txt
index 1530794..c8af011 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -21,7 +21,7 @@ MarkupSafe==1.1.1
 mock==3.0.5
 numba==0.43.1
 numpy==1.16.4
-protobuf==3.8.0
+protobuf==3.18.3
 PyYAML==5.1
 resampy==0.2.1
 scikit-learn==0.20.3