diff --git a/requirements2.7.txt b/requirements2.7.txt
index 6a3b737..9ed57e1 100644
--- a/requirements2.7.txt
+++ b/requirements2.7.txt
@@ -9,7 +9,7 @@ networkx==2.2
 numpy==1.16.3
 Pillow==8.3.2
 pkg-resources==0.0.0
-protobuf==3.7.1
+protobuf==3.15.0
 pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1