diff --git a/requirements.txt b/requirements.txt
index 15cadf9..1d9b0e6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ Markdown==3.1.1
 matplotlib==3.1.1
 numpy==1.17.2
 opencv-python==4.1.1.26
-protobuf==3.9.1
+protobuf==3.15.0
 pyparsing==2.4.2
 python-dateutil==2.8.0
 PyYAML==5.1.2