diff --git a/requirements.txt b/requirements.txt
index a216101..8e4c6fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ typing-extensions>=4.0
 # ONNX parsing
 onnx>=1.14.0
 numpy>=1.21.0
-protobuf>=3.20.0
+protobuf>=6.33.6
 
 # Package publishing and automation
 requests>=2.28.0