diff --git a/requirements.txt b/requirements.txt
index 383b8ad..36c3192 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ nltk==3.4.5
 numpy==1.16.4
 Pillow==6.2.0
 pkg-resources==0.0.0
-protobuf==3.8.0
+protobuf==3.15.0
 python-dateutil==2.8.0
 requests==2.22.0
 s3transfer==0.2.0