diff --git a/Open-RL-Torcs/requirements.txt b/Open-RL-Torcs/requirements.txt
index 5b5a1fad..5d397c4f 100644
--- a/Open-RL-Torcs/requirements.txt
+++ b/Open-RL-Torcs/requirements.txt
@@ -14,7 +14,7 @@ mock==3.0.5
 numpy==1.16.6
 opencv-python==4.2.0.32
 pkg-resources==0.0.0
-protobuf==3.11.3
+protobuf==3.15.0
 six==1.14.0
 sysv-ipc==1.0.1
 tensorboard==1.11.0