diff --git a/internal/frostfs/util/util.go b/internal/frostfs/util/util.go
index 3c69955..444504b 100644
--- a/internal/frostfs/util/util.go
+++ b/internal/frostfs/util/util.go
@@ -28,6 +28,7 @@ func ResolveContractHash(contractHash, rpcAddress string) (util.Uint160, error)
 	if err := nns.Dial(rpcAddress); err != nil {
 		return util.Uint160{}, fmt.Errorf("dial nns %s: %w", rpcAddress, err)
 	}
+	defer nns.Close()
 
 	return nns.ResolveContractHash(domain)
 }