diff --git a/requirements.txt b/requirements.txt
index 63d0057..b505b55 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 dbus-next==0.2.3
+protobuf==5.27.0
 grpcio==1.62.2
 pySMART==1.3.0