diff --git a/requirements.txt b/requirements.txt
index 30efe13..172fb33 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ oauthlib==3.1.0
 pandas==0.25.1
 patsy==0.5.1
 pkg-resources==0.0.0
-protobuf==3.11.2
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.2