diff --git a/requirements.txt b/requirements.txt
index d5a4aa0..68f6b74 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -55,7 +55,7 @@ Pillow==4.3.0
 progressbar2==3.39.2
 prometheus-client==0.5.0
 prompt-toolkit==2.0.7
-protobuf==3.6.0
+protobuf==3.18.3
 ptyprocess==0.5.2
 Pygments==2.2.0
 pygraphviz==1.5