diff --git a/requirements.txt b/requirements.txt
index 6e9e18c..e2164f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ mkl-fft==1.0.14
 mkl-random==1.0.2
 mkl-service==2.0.2
 numpy==1.16.4
-protobuf==3.8.0
+protobuf==3.15.0
 PyYAML==5.1.2
 scipy==1.3.1
 six==1.12.0