diff --git a/requirements.txt b/requirements.txt
index 0ab9fc4..796de16 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ matplotlib==2.1.2
 numpy==1.14.0
 pandas==0.22.0
 progressbar2==3.36.0
-protobuf==3.5.1
+protobuf==3.15.0
 pyfasttext==0.4.4
 pyparsing==2.2.0
 python-dateutil==2.6.1