diff --git a/requirements.txt b/requirements.txt
index d5474d7..05ad9bd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 numpy==1.17.2
 Pillow==8.3.2
-protobuf==3.9.1
+protobuf==3.15.0
 six==1.12.0
 tensorboardX==1.8
 torch==1.2.0