diff --git a/requirements.txt b/requirements.txt
index 0c4f338..8558af9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ numpy==1.18.2
 opencv-python==4.2.0.32
 Pillow==7.0.0
 pkg-resources==0.0.0
-protobuf==3.11.3
+protobuf==3.15.0
 pyparsing==2.4.6
 python-dateutil==2.8.1
 six==1.14.0