diff --git a/pyproject.toml b/pyproject.toml
index 4a1a99897..a046ebe65 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dependencies = [
     "exceptiongroup>=1.3.0",  # TODO: drop if Python >= 3.11 guaranteed
     "grpcio>=1.64.1, <2.0.0",
     "grpcio-reflection>=1.64.1, <2.0.0",
-    "protobuf>=5.27.0",
+    "protobuf>=5.29.6",
     "jinja2>=3.0.2",
     "pexpect>=4.8.0",
     "pyserial-labgrid>=3.4.0.1",