diff --git a/requirements.txt b/requirements.txt
index 6543a4d..fd52be7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ pickleshare==0.7.4
 Pillow==4.3.0
 pipenv==8.3.1
 prompt-toolkit==1.0.15
-protobuf==3.4.0
+protobuf==3.18.3
 psutil==5.3.1
 pycodestyle==2.3.1
 pyflakes==1.6.0