diff --git a/requirements.txt b/requirements.txt
index bee7d70..5e06759 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ opencv-python==3.4.2.17
 pexpect==4.6.0
 pickleshare==0.7.4
 Pillow==5.2.0
-protobuf==3.6.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 pyparsing==2.2.0
 python-dateutil==2.7.3