diff --git a/requirements.txt b/requirements.txt
index 3d91f70..d5acf61 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ plac==1.1.3
 plotly==4.12.0
 pluggy==0.13.1
 preshed==3.0.2
-protobuf==3.13.0
+protobuf==3.15.0
 py==1.9.0
 pyparsing==2.4.7
 pytest==6.1.1