diff --git a/pyproject.toml b/pyproject.toml
index eb40e1d..f3cc26f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,10 @@ line_length = 120
 [tool.mypy]
 ignore_missing_imports = true
 
+[[tool.mypy.overrides]]
+module = "google.protobuf.*"
+ignore_missing_imports = true
+
 [tool.pytest]
 python_files = ["*_tests.py", "tests.py", "test_*.py"]
 
diff --git a/tox.ini b/tox.ini
index ac9aea2..67ddaf2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -54,6 +54,7 @@ commands =
 # run style checks
 commands =
     flake8
+    mypy gp2040ce_bintools
     - flake8 --disable-noqa --ignore= --select=E,W,F,C,D,A,G,B,I,T,M,DUO
 
 [coverage:paths]