diff --git a/pyproject.toml b/pyproject.toml
index 822e0755..c73e6cd3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -89,7 +89,7 @@ ruff = ">=0.5.1,<0.14.11"
 types-toml = "^0.10.8.1"
 types-pytz = ">=2023.3,<2026.0"
 types-chardet = "^5.0.4.6"
-mypy-protobuf = "^3.0.0"
+mypy-protobuf = ">=3,<5"
 
 
 [tool.poetry.group.test.dependencies]