diff --git a/source_code/CNN_DDPG_implementation/requirements.txt b/source_code/CNN_DDPG_implementation/requirements.txt
index 74eb8ff..d13853e 100644
--- a/source_code/CNN_DDPG_implementation/requirements.txt
+++ b/source_code/CNN_DDPG_implementation/requirements.txt
@@ -37,7 +37,7 @@ pickleshare==0.7.5
 Pillow==6.0.0
 pkg-resources==0.0.0
 prompt-toolkit==2.0.9
-protobuf==3.7.1
+protobuf==3.18.3
 ptan==0.3
 ptyprocess==0.6.0
 pyglet==1.3.2