diff --git a/requirements.txt b/requirements.txt
index c1237f3..c478e16 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ networkx==2.2
 numpy==1.16.2
 pbr==5.1.3
 Pillow==8.2.0
-protobuf==3.7.1
+protobuf==3.15.0
 pyparsing==2.4.0
 python-dateutil==2.8.0
 PyWavelets==1.0.2