diff --git a/requirements.txt b/requirements.txt
index b17f27c..7627892 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ pickleshare==0.7.5
 Pillow==8.1.1
 promise==2.2.1
 prompt-toolkit==2.0.9
-protobuf==3.9.1
+protobuf==3.18.3
 psutil==5.6.6
 ptyprocess==0.6.0
 Pygments==2.7.4