diff --git a/requirements_minimum.txt b/requirements_minimum.txt
index ea612e1..36d44d2 100644
--- a/requirements_minimum.txt
+++ b/requirements_minimum.txt
@@ -25,7 +25,7 @@ matplotlib==3.1.2
 networkx==2.4
 numpy==1.18.1
 Pillow==7.0.0
-protobuf==3.11.2
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.6