diff --git a/session/alias.go b/session/alias.go
new file mode 100644
index 0000000..aa49d55
--- /dev/null
+++ b/session/alias.go
@@ -0,0 +1,15 @@
+package session
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/refs"
+	"github.com/nspcc-dev/neofs-api-go/service"
+)
+
+// OwnerID is a type alias of OwnerID ref.
+type OwnerID = refs.OwnerID
+
+// TokenID is a type alias of TokenID ref.
+type TokenID = service.TokenID
+
+// Token is a type alias of Token.
+type Token = service.Token
diff --git a/session/types.go b/session/types.go
index 435616a..a4a1643 100644
--- a/session/types.go
+++ b/session/types.go
@@ -5,23 +5,6 @@ import (
 	"crypto/ecdsa"
 
 	"github.com/nspcc-dev/neofs-api-go/internal"
-	"github.com/nspcc-dev/neofs-api-go/refs"
-	"github.com/nspcc-dev/neofs-api-go/service"
-)
-
-type (
-	// ObjectID type alias.
-	ObjectID = refs.ObjectID
-	// OwnerID type alias.
-	OwnerID = refs.OwnerID
-	// TokenID type alias.
-	TokenID = refs.UUID
-	// Token type alias
-	Token = service.Token
-	// Address type alias
-	Address = refs.Address
-	// Verb is Token_Info_Verb type alias
-	Verb = service.Token_Info_Verb
 )
 
 // PrivateToken is an interface of session private part.