diff --git a/requirements.txt b/requirements.txt
index d0daef9..005c8d4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ nltk==3.4.5
 numpy==1.17.1
 Pillow>=7.1.0
 progressbar2==3.43.1
-protobuf==3.9.1
+protobuf==3.18.3
 pyparsing==2.4.2
 python-engineio==3.9.3
 python-socketio==4.3.1