diff --git a/requirements.txt b/requirements.txt
index 0c7d3a3c..0fe4e165 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ matplotlib==3.1.1
 numpy==1.17.0
 Pillow==6.1.0
 progress==1.5
-protobuf==3.9.1
+protobuf==3.15.0
 pyparsing==2.4.4
 python-dateutil==2.8.1
 scipy==1.3.1