diff --git a/object/types.proto b/object/types.proto
index e6bb914..6de2531 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -50,13 +50,11 @@ message SystemHeader {
     uint64 Version       = 1;
     // PayloadLength is an object payload length
     uint64 PayloadLength = 2;
-
-    // ID is an object identifier, is a valid UUIDv4
-    bytes ID = 3;
+    // Address carries object address in the NeoFS system.
+    // It encapsulates the object and the container identifiers.
+    refs.Address Address = 3;
     // OwnerID is a wallet address
     bytes OwnerID = 4;
-    // CID is a SHA256 hash of the container structure (container identifier)
-    bytes CID = 5;
     // CreationEpoch carries number of NeoFS epoch on which the object was created.
     uint64 CreationEpoch = 6;
 }
diff --git a/proto-docs/object.md b/proto-docs/object.md
index eb69f23..0b0ac7c 100644
--- a/proto-docs/object.md
+++ b/proto-docs/object.md
@@ -463,9 +463,8 @@ Header groups the information about the NeoFS object.
 | ----- | ---- | ----- | ----------- |
 | Version | [uint64](#uint64) |  | Version of the object structure |
 | PayloadLength | [uint64](#uint64) |  | PayloadLength is an object payload length |
-| ID | [bytes](#bytes) |  | ID is an object identifier, is a valid UUIDv4 |
+| Address | [refs.Address](#refs.Address) |  | Address carries object address in the NeoFS system. It encapsulates the object and the container identifiers. |
 | OwnerID | [bytes](#bytes) |  | OwnerID is a wallet address |
-| CID | [bytes](#bytes) |  | CID is a SHA256 hash of the container structure (container identifier) |
 | CreationEpoch | [uint64](#uint64) |  | CreationEpoch carries number of NeoFS epoch on which the object was created. |