diff --git a/requirements.txt b/requirements.txt
index e6b8e62..12b46f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ Markdown==3.3.3
 matplotlib==3.3.3
 numpy==1.16.0
 Pillow==8.0.1
-protobuf==3.14.0
+protobuf==3.15.0
 pyparsing==2.4.7
 python-dateutil==2.8.1
 scipy==1.2.1