diff --git a/requirements.txt b/requirements.txt
index dadcd48..c090776 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ numpy==1.16.1
 onnx==1.5.0
 opencv-python==3.4.4.19
 Pillow==6.2.0
-protobuf==3.8.0
+protobuf==3.15.0
 scipy==1.1.0
 tensorboard==1.9.0
 tensorboardX==1.6