diff --git a/requirements.txt b/requirements.txt
index 73a98d2..d029c3e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,7 +50,7 @@ oauth2client==4.1.3
 pandas==0.23.4
 pefile==2018.8.8
 Pillow==6.2.0
-protobuf==3.6.1
+protobuf==3.15.0
 pyasn1==0.4.4
 pyasn1-modules==0.2.2
 pycparser==2.18