diff --git a/Sming/Libraries/nanopb/requirements.txt b/Sming/Libraries/nanopb/requirements.txt
index b0c79cc0ec..5f2eff8594 100644
--- a/Sming/Libraries/nanopb/requirements.txt
+++ b/Sming/Libraries/nanopb/requirements.txt
@@ -1 +1,2 @@
+grpcio-tools
 protobuf