diff --git a/requirements.txt b/requirements.txt
index 044abb4..17177dc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ pexpect==4.1.0
 pickleshare==0.7.2
 Pillow==3.2.0
 pkg-resources==0.0.0
-protobuf==2.6.1
+protobuf==3.18.3
 ptyprocess==0.5.1
 Pygments==2.1.3
 pyparsing==2.1.3