diff --git a/DMAN_MOT/requirements.txt b/DMAN_MOT/requirements.txt
index 7b14196..15d63da 100644
--- a/DMAN_MOT/requirements.txt
+++ b/DMAN_MOT/requirements.txt
@@ -143,7 +143,7 @@ pluggy==0.13.1
 ply==3.11
 prometheus-client==0.7.1
 prompt-toolkit==1.0.15
-protobuf==3.11.2
+protobuf==3.18.3
 psutil==5.6.7
 ptyprocess==0.6.0
 py==1.8.0