diff --git a/authorization_message.proto b/authorization_message.proto
index cd697ba..9907118 100644
--- a/authorization_message.proto
+++ b/authorization_message.proto
@@ -75,7 +75,7 @@ message CheckIAMReq {
 message InternalIAM {
   User user = 1;
   IdentityBasic identity = 2;
-  optional Company company = 3;
+  repeated Company company = 3;
 }
 message IdReqWithIAM {
   int64 id = 1;