diff --git a/requirements.txt b/requirements.txt
index f8e02796..b23129e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ opt-einsum==3.1.0
 pandas==0.25.3
 pep8==1.7.1
 Pillow==7.0.0
-protobuf==3.11.2
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycodestyle==2.5.0