diff --git a/DDPG/requirements.txt b/DDPG/requirements.txt
index e21f072..b49a8fe 100644
--- a/DDPG/requirements.txt
+++ b/DDPG/requirements.txt
@@ -49,7 +49,7 @@ pathlib2==2.3.5
 pigar==0.9.2
 Pillow==6.1.0
 plotly==4.4.1
-protobuf==3.9.1
+protobuf==3.18.3
 psutil==5.6.7
 py-cpuinfo==5.0.0
 pycparser==2.19