diff --git a/requirements.txt b/requirements.txt
index 5fb0e47..9d45d39 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ mkl-random==1.1.0
 mkl-service==2.3.0
 numpy==1.18.1
 Pillow==7.0.0
-protobuf==3.11.4
+protobuf==3.15.0
 pyglet==1.4.10
 pyparsing==2.4.6
 python-dateutil==2.8.1