diff --git a/requirements.txt b/requirements.txt
index 94da1d2..3dad3ae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ mccabe==0.6.1
 numpy==1.19.4
 packaging==20.8
 pandas==1.1.5
-protobuf==3.14.0
+protobuf==3.15.0
 pycodestyle==2.6.0
 pyflakes==2.2.0
 pyparsing==2.4.7