diff --git a/requirements.txt b/requirements.txt
index 30745c1..d552f31 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ numpy==1.13.3
 pandas==0.21.0
 patsy==0.4.1
 Pillow==3.1.2
-protobuf==3.5.0.post1
+protobuf==3.15.0
 psutil==5.4.1
 pycrypto==2.6.1
 pymongo==3.5.1