diff --git a/DTI-CDF_requirements.txt b/DTI-CDF_requirements.txt
index 1f01fd2..8bbbaca 100644
--- a/DTI-CDF_requirements.txt
+++ b/DTI-CDF_requirements.txt
@@ -54,7 +54,7 @@ pexpect==4.7.0
 pickleshare==0.7.5
 prometheus-client==0.6.0
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.18.3
 psutil==5.4.8
 ptyprocess==0.6.0
 Pygments==2.4.0