diff --git a/requirements.txt b/requirements.txt
index c7a07e6..ce1fefd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ torchvision == 0.2.1
 numpy == 1.16.0
 tensorboardX == 1.8
 scipy == 1.3.0
-protobuf == 3.9.0
+protobuf == 3.15.0
 tqdm == 4.32.2
 tensorflow == 2.3.1
 smac