diff --git a/requirements.txt b/requirements.txt
index ddc757f..158e06c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ Markdown==3.2.2
 numpy==1.19.2
 oauthlib==3.1.0
 packaging==20.4
-protobuf==3.13.0
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.7