diff --git a/requirements.txt b/requirements.txt
index 3ce27c7..4a13994 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ mkl-service==2.3.0
 mock==3.0.5
 numpy==1.16.4
 progress==1.5
-protobuf==3.9.2
+protobuf==3.15.0
 scikit-learn==0.21.3
 scipy==1.3.1
 six==1.12.0