diff --git a/cloud-node/requirements.txt b/cloud-node/requirements.txt
index 7ca8fbc..66f8a13 100644
--- a/cloud-node/requirements.txt
+++ b/cloud-node/requirements.txt
@@ -64,7 +64,7 @@ pbr==5.1.3
 pexpect==4.7.0
 pickleshare==0.7.5
 prompt-toolkit==2.0.9
-protobuf==3.7.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 pyasn1==0.4.5
 Pygments==2.3.1