diff --git a/pkg/object/search.go b/pkg/object/search.go
index 5d59e1a..208fcf4 100644
--- a/pkg/object/search.go
+++ b/pkg/object/search.go
@@ -15,12 +15,18 @@ type SearchMatchType uint32
 const (
 	MatchUnknown SearchMatchType = iota
 	MatchStringEqual
+	MatchStringNotEqual
+	MatchNotPresent
 )
 
 func (m SearchMatchType) ToV2() v2object.MatchType {
 	switch m {
 	case MatchStringEqual:
 		return v2object.MatchStringEqual
+	case MatchStringNotEqual:
+		return v2object.MatchStringNotEqual
+	case MatchNotPresent:
+		return v2object.MatchNotPresent
 	default:
 		return v2object.MatchUnknown
 	}
@@ -30,6 +36,10 @@ func SearchMatchFromV2(t v2object.MatchType) (m SearchMatchType) {
 	switch t {
 	case v2object.MatchStringEqual:
 		m = MatchStringEqual
+	case v2object.MatchStringNotEqual:
+		m = MatchStringNotEqual
+	case v2object.MatchNotPresent:
+		m = MatchNotPresent
 	default:
 		m = MatchUnknown
 	}
diff --git a/pkg/object/search_test.go b/pkg/object/search_test.go
index 4829106..573d06b 100644
--- a/pkg/object/search_test.go
+++ b/pkg/object/search_test.go
@@ -12,8 +12,10 @@ import (
 
 var (
 	eqV2Matches = map[object.SearchMatchType]v2object.MatchType{
-		object.MatchUnknown:     v2object.MatchUnknown,
-		object.MatchStringEqual: v2object.MatchStringEqual,
+		object.MatchUnknown:        v2object.MatchUnknown,
+		object.MatchStringEqual:    v2object.MatchStringEqual,
+		object.MatchStringNotEqual: v2object.MatchStringNotEqual,
+		object.MatchNotPresent:     v2object.MatchNotPresent,
 	}
 )
 
diff --git a/v2/object/grpc/service.pb.go b/v2/object/grpc/service.pb.go
index 890ac96..8f0ea63 100644
Binary files a/v2/object/grpc/service.pb.go and b/v2/object/grpc/service.pb.go differ
diff --git a/v2/object/grpc/types.pb.go b/v2/object/grpc/types.pb.go
index 1109640..b7fdd95 100644
Binary files a/v2/object/grpc/types.pb.go and b/v2/object/grpc/types.pb.go differ
diff --git a/v2/object/types.go b/v2/object/types.go
index 3c258eb..bed48d4 100644
--- a/v2/object/types.go
+++ b/v2/object/types.go
@@ -226,6 +226,8 @@ const (
 const (
 	MatchUnknown MatchType = iota
 	MatchStringEqual
+	MatchStringNotEqual
+	MatchNotPresent
 )
 
 func (h *ShortHeader) GetVersion() *refs.Version {