diff --git a/requirements.txt b/requirements.txt
index 32455ee..cb0db9e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ opt-einsum==3.1.0
 peewee==3.13.1
 pefile==2019.4.18
 Pillow==8.1.1
-protobuf==3.11.3
+protobuf==3.15.0
 psutil==5.7.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8