diff --git a/requirements.txt b/requirements.txt
index d5b3bac..7e1c20e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ numpy==1.16.1
 opencv-python==4.0.0.21
 pandas==0.24.1
 Pillow==5.4.1
-protobuf==3.6.1
+protobuf==3.15.0
 pyparsing==2.3.1
 python-dateutil==2.8.0
 pytz==2018.9