diff --git a/requirements.txt b/requirements.txt
index 792fc8c..44a4885 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ nltk==3.4
 numpy==1.16.1
 oauthlib==3.1.0
 pandas==0.24.1
-protobuf==3.7.1
+protobuf==3.15.0
 pymongo==3.7.2
 pyparsing==2.3.1
 PySocks==1.7.1