diff --git a/tox.ini b/tox.ini
index da42c36..434f074 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,6 +25,8 @@ deps =
     mdformat-toc
     pytest
     pytest-grpc
+    grpcio-tools
+    grpcio
 commands =
     poetry run flake8 .
     poetry run isort --check-only .