diff --git a/isolation-forest-onnx/requirements.txt b/isolation-forest-onnx/requirements.txt
index f757ae0..c48c5de 100644
--- a/isolation-forest-onnx/requirements.txt
+++ b/isolation-forest-onnx/requirements.txt
@@ -2,4 +2,4 @@ avro-python3==1.9.1
 numpy==1.26.4
 onnx==1.17.0
 onnxruntime==1.18.0
-protobuf==5.26.1
+protobuf==5.29.5
diff --git a/isolation-forest-onnx/setup.cfg b/isolation-forest-onnx/setup.cfg
index 490bc87..88f6998 100644
--- a/isolation-forest-onnx/setup.cfg
+++ b/isolation-forest-onnx/setup.cfg
@@ -17,7 +17,7 @@ install_requires =
     numpy==1.26.4
     onnx==1.17.0
     onnxruntime==1.18.0
-    protobuf==5.26.1
+    protobuf==5.29.5
 
 [options.extras_require]
 test =