diff --git a/requirements.txt b/requirements.txt
index f5c7009..1d54c9f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ nltk==3.4.5
 numpy==1.17.4
 pandas==0.25.3
 Pillow==6.2.1
-protobuf==3.11.2
+protobuf==3.15.0
 python-dateutil==2.8.1
 pytz==2019.3
 scikit-learn==0.21.3