diff --git a/requirements.txt b/requirements.txt
index aa81ccc..d3068ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ pexpect==4.6.0
 pickleshare==0.7.5
 Pillow==5.2.0
 prompt-toolkit==2.0.5
-protobuf==3.6.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 Pygments==2.2.0
 pylint==2.1.1