diff --git a/requirements.txt b/requirements.txt
index a3007dc..31e8474 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ gym==0.7.3
 h5py==2.6.0
 Keras==1.2.1
 numpy==1.12.0
-protobuf==3.2.0
+protobuf==3.18.3
 pyglet==1.2.4
 PyOpenGL==3.1.0
 PyYAML==3.12