diff --git a/requirements.txt b/requirements.txt
index f9141f0..c3d7d5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ nltk==3.5
 numpy==1.19.4
 packaging==20.8
 pandas==1.1.5
-protobuf==3.14.0
+protobuf==3.18.3
 pycodestyle==2.6.0
 pyflakes==2.2.0
 pyparsing==2.4.7