diff --git a/pyproject.toml b/pyproject.toml
index bb806345..bbcfdd09 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ dependencies = [
     "Jinja2>=3.1.2,<=3.1.6",
     "netaddr<=1.3.0,>=0.7.0",
     "networkx>=2.3,<=3.4.2",
-    "protobuf>=5.0.0,<=5.29.3",
+    "protobuf>=5.0.0,<=6.31.1",
     "pytest<=8.3.5",
     "pytest-cov<=6.0.0",
     "python-dotenv<=1.1.0",