diff --git a/protos/dmi/sw_management_service.proto b/protos/dmi/sw_management_service.proto
index 3dda39f..754a654 100644
--- a/protos/dmi/sw_management_service.proto
+++ b/protos/dmi/sw_management_service.proto
@@ -19,6 +19,11 @@
 }
 
 message GetSoftwareVersionInformationResponse {
+    enum Reason {
+        UNDEFINED_REASON = 0;
+        UNKNOWN_DEVICE = 1;
+        INTERNAL_ERROR = 2;
+    }
     Status status = 1;
     Reason reason = 2;
     SoftwareVersionInformation info = 3;
@@ -38,6 +43,14 @@
 }
 
 message ConfigResponse {
+    enum Reason {
+        UNDEFINED_REASON = 0;
+        UNKNOWN_DEVICE = 1;
+        INTERNAL_ERROR = 2;
+        ERROR_FETCHING_CONFIG = 3;
+        INVALID_CONFIG = 4;
+        OPERATION_ALREADY_IN_PROGRESS = 5;
+    }
     Status status = 1;
     Reason reason = 2;
 }