diff --git a/requirements.txt b/requirements.txt
index 91620f4..e7c067c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ matplotlib==3.0.2
 mccabe==0.6.1
 numpy==1.15.4
 pandas==0.24.1
-protobuf==3.6.1
+protobuf==3.18.3
 pylint==2.2.2
 pyparsing==2.3.1
 python-dateutil==2.8.0