diff --git a/dev-requirements.txt b/dev-requirements.txt
index 6296fdd..70a10ac 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -2,4 +2,5 @@ pytest
 pytest-cov
 pytest-mock
 codecov
-pytoml
\ No newline at end of file
+pytoml
+grpcio==1.27.*
\ No newline at end of file