diff --git a/requirements.txt b/requirements.txt
index 601e3a0..34c3ed4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ idna==2.9
 itsdangerous==1.1.0
 Jinja2==2.11.1
 MarkupSafe==1.1.1
-protobuf==3.11.3
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pytz==2019.3