diff --git a/requirements.txt b/requirements.txt
index ac253fb..cdd3dcc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ numpy==1.17.4
 opencv-python==4.1.1.26
 opt-einsum==3.1.0
 Pillow==6.2.1
-protobuf==3.10.0
+protobuf==3.15.0
 six==1.13.0
 tensorboard==1.15.0
 tensorflow==1.15.0