diff --git a/vendor/github.com/prometheus/tsdb/block.go b/vendor/github.com/prometheus/tsdb/block.go
index 400cdac78..8cf28fe0e 100644
--- a/vendor/github.com/prometheus/tsdb/block.go
+++ b/vendor/github.com/prometheus/tsdb/block.go
@@ -151,6 +151,9 @@ type BlockMeta struct {
 
 	// Information on compactions the block was created from.
 	Compaction BlockMetaCompaction `json:"compaction"`
+
+	// Version of the index format.
+	Version int `json:"version"`
 }
 
 // BlockStats contains stats about contents of a block.
@@ -176,12 +179,6 @@ const (
 	flagStd  = 1
 )
 
-type blockMeta struct {
-	Version int `json:"version"`
-
-	*BlockMeta
-}
-
 const indexFilename = "index"
 const metaFilename = "meta.json"
 
@@ -193,16 +190,16 @@ func readMetaFile(dir string) (*BlockMeta, error) {
 	if err != nil {
 		return nil, err
 	}
-	var m blockMeta
+	var m BlockMeta
 
 	if err := json.Unmarshal(b, &m); err != nil {
 		return nil, err
 	}
-	if m.Version != 1 {
+	if m.Version != 1 && m.Version != 2 {
 		return nil, errors.Errorf("unexpected meta file version %d", m.Version)
 	}
 
-	return m.BlockMeta, nil
+	return &m, nil
 }
 
 func writeMetaFile(dir string, meta *BlockMeta) error {
@@ -219,7 +216,8 @@ func writeMetaFile(dir string, meta *BlockMeta) error {
 	enc.SetIndent("", "\t")
 
 	var merr MultiError
-	if merr.Add(enc.Encode(&blockMeta{Version: 1, BlockMeta: meta})); merr.Err() != nil {
+
+	if merr.Add(enc.Encode(meta)); merr.Err() != nil {
 		merr.Add(f.Close())
 		return merr.Err()
 	}
@@ -255,7 +253,7 @@ func OpenBlock(dir string, pool chunkenc.Pool) (*Block, error) {
 	if err != nil {
 		return nil, err
 	}
-	ir, err := index.NewFileReader(filepath.Join(dir, "index"))
+	ir, err := index.NewFileReader(filepath.Join(dir, "index"), meta.Version)
 	if err != nil {
 		return nil, err
 	}
@@ -321,7 +319,7 @@ func (pb *Block) Index() (IndexReader, error) {
 	if err := pb.startRead(); err != nil {
 		return nil, err
 	}
-	return blockIndexReader{IndexReader: pb.indexr, b: pb}, nil
+	return blockIndexReader{ir: pb.indexr, b: pb}, nil
 }
 
 // Chunks returns a new ChunkReader against the block data.
@@ -346,8 +344,40 @@ func (pb *Block) setCompactionFailed() error {
 }
 
 type blockIndexReader struct {
-	IndexReader
-	b *Block
+	ir IndexReader
+	b  *Block
+}
+
+func (r blockIndexReader) Symbols() (map[string]struct{}, error) {
+	s, err := r.ir.Symbols()
+	return s, errors.Wrapf(err, "block: %s", r.b.Meta().ULID)
+}
+
+func (r blockIndexReader) LabelValues(names ...string) (index.StringTuples, error) {
+	st, err := r.ir.LabelValues(names...)
+	return st, errors.Wrapf(err, "block: %s", r.b.Meta().ULID)
+}
+
+func (r blockIndexReader) Postings(name, value string) (index.Postings, error) {
+	p, err := r.ir.Postings(name, value)
+	return p, errors.Wrapf(err, "block: %s", r.b.Meta().ULID)
+}
+
+func (r blockIndexReader) SortedPostings(p index.Postings) index.Postings {
+	return r.ir.SortedPostings(p)
+}
+
+func (r blockIndexReader) Series(ref uint64, lset *labels.Labels, chks *[]chunks.Meta) error {
+	return errors.Wrapf(
+		r.ir.Series(ref, lset, chks),
+		"block: %s",
+		r.b.Meta().ULID,
+	)
+}
+
+func (r blockIndexReader) LabelIndices() ([][]string, error) {
+	ss, err := r.ir.LabelIndices()
+	return ss, errors.Wrapf(err, "block: %s", r.b.Meta().ULID)
 }
 
 func (r blockIndexReader) Close() error {
diff --git a/vendor/github.com/prometheus/tsdb/compact.go b/vendor/github.com/prometheus/tsdb/compact.go
index 5c532759f..f96e64394 100644
--- a/vendor/github.com/prometheus/tsdb/compact.go
+++ b/vendor/github.com/prometheus/tsdb/compact.go
@@ -428,6 +428,7 @@ func (c *LeveledCompactor) write(dest string, meta *BlockMeta, blocks ...BlockRe
 	}
 
 	indexw, err := index.NewWriter(filepath.Join(tmp, indexFilename))
+	meta.Version = indexw.Version
 	if err != nil {
 		return errors.Wrap(err, "open index writer")
 	}
diff --git a/vendor/github.com/prometheus/tsdb/head.go b/vendor/github.com/prometheus/tsdb/head.go
index 4652c9579..4e1bea957 100644
--- a/vendor/github.com/prometheus/tsdb/head.go
+++ b/vendor/github.com/prometheus/tsdb/head.go
@@ -397,7 +397,7 @@ func (h *rangeHead) Tombstones() (TombstoneReader, error) {
 	return h.head.tombstones, nil
 }
 
-// initAppender is a helper to initialize the time bounds of a the head
+// initAppender is a helper to initialize the time bounds of the head
 // upon the first sample it receives.
 type initAppender struct {
 	app  Appender
@@ -604,7 +604,7 @@ func (h *Head) Delete(mint, maxt int64, ms ...labels.Matcher) error {
 	return nil
 }
 
-// gc removes data before the minimum timestmap from the head.
+// gc removes data before the minimum timestamp from the head.
 func (h *Head) gc() {
 	// Only data strictly lower than this timestamp must be deleted.
 	mint := h.MinTime()
@@ -962,7 +962,7 @@ func (m seriesHashmap) del(hash uint64, lset labels.Labels) {
 }
 
 // stripeSeries locks modulo ranges of IDs and hashes to reduce lock contention.
-// The locks are padded to not be on the same cache line. Filling the badded space
+// The locks are padded to not be on the same cache line. Filling the padded space
 // with the maps was profiled to be slower – likely due to the additional pointer
 // dereferences.
 type stripeSeries struct {
@@ -1092,7 +1092,7 @@ type sample struct {
 }
 
 // memSeries is the in-memory representation of a series. None of its methods
-// are goroutine safe and its the callers responsibility to lock it.
+// are goroutine safe and it is the caller's responsibility to lock it.
 type memSeries struct {
 	sync.Mutex
 
diff --git a/vendor/github.com/prometheus/tsdb/index/index.go b/vendor/github.com/prometheus/tsdb/index/index.go
index ad6dbb218..f6b680b36 100644
--- a/vendor/github.com/prometheus/tsdb/index/index.go
+++ b/vendor/github.com/prometheus/tsdb/index/index.go
@@ -98,7 +98,7 @@ func newCRC32() hash.Hash32 {
 	return crc32.New(castagnoliTable)
 }
 
-// indexWriter implements the IndexWriter interface for the standard
+// Writer implements the IndexWriter interface for the standard
 // serialization format.
 type Writer struct {
 	f    *os.File
@@ -122,6 +122,8 @@ type Writer struct {
 	lastSeries labels.Labels
 
 	crc32 hash.Hash
+
+	Version int
 }
 
 type indexTOC struct {
@@ -166,6 +168,8 @@ func NewWriter(fn string) (*Writer, error) {
 		symbols:       make(map[string]uint32, 1<<13),
 		seriesOffsets: make(map[uint64]uint64, 1<<16),
 		crc32:         newCRC32(),
+
+		Version: 2,
 	}
 	if err := iw.writeMeta(); err != nil {
 		return nil, err
@@ -180,12 +184,12 @@ func (w *Writer) write(bufs ...[]byte) error {
 		if err != nil {
 			return err
 		}
-		// For now the index file must not grow beyond 4GiB. Some of the fixed-sized
+		// For now the index file must not grow beyond 64GiB. Some of the fixed-sized
 		// offset references in v1 are only 4 bytes large.
 		// Once we move to compressed/varint representations in those areas, this limitation
 		// can be lifted.
-		if w.pos > math.MaxUint32 {
-			return errors.Errorf("exceeding max size of 4GiB")
+		if w.pos > 16*math.MaxUint32 {
+			return errors.Errorf("exceeding max size of 64GiB")
 		}
 	}
 	return nil
@@ -250,6 +254,7 @@ func (w *Writer) writeMeta() error {
 	return w.write(w.buf1.get())
 }
 
+// AddSeries adds the series one at a time along with its chunks.
 func (w *Writer) AddSeries(ref uint64, lset labels.Labels, chunks ...chunks.Meta) error {
 	if err := w.ensureStage(idxStageSeries); err != nil {
 		return err
@@ -261,23 +266,25 @@ func (w *Writer) AddSeries(ref uint64, lset labels.Labels, chunks ...chunks.Meta
 	if _, ok := w.seriesOffsets[ref]; ok {
 		return errors.Errorf("series with reference %d already added", ref)
 	}
-	w.seriesOffsets[ref] = w.pos
+	w.addPadding(16)
+	w.seriesOffsets[ref] = w.pos / 16
 
 	w.buf2.reset()
 	w.buf2.putUvarint(len(lset))
 
 	for _, l := range lset {
-		offset, ok := w.symbols[l.Name]
+		// here we have an index for the symbol file if v2, otherwise it's an offset
+		index, ok := w.symbols[l.Name]
 		if !ok {
 			return errors.Errorf("symbol entry for %q does not exist", l.Name)
 		}
-		w.buf2.putUvarint32(offset)
+		w.buf2.putUvarint32(index)
 
-		offset, ok = w.symbols[l.Value]
+		index, ok = w.symbols[l.Value]
 		if !ok {
 			return errors.Errorf("symbol entry for %q does not exist", l.Value)
 		}
-		w.buf2.putUvarint32(offset)
+		w.buf2.putUvarint32(index)
 	}
 
 	w.buf2.putUvarint(len(chunks))
@@ -335,8 +342,8 @@ func (w *Writer) AddSymbols(sym map[string]struct{}) error {
 
 	w.symbols = make(map[string]uint32, len(symbols))
 
-	for _, s := range symbols {
-		w.symbols[s] = uint32(w.pos) + headerSize + uint32(w.buf2.len())
+	for index, s := range symbols {
+		w.symbols[s] = uint32(index)
 		w.buf2.putUvarintStr(s)
 	}
 
@@ -375,12 +382,13 @@ func (w *Writer) WriteLabelIndex(names []string, values []string) error {
 	w.buf2.putBE32int(len(names))
 	w.buf2.putBE32int(valt.Len())
 
+	// here we have an index for the symbol file if v2, otherwise it's an offset
 	for _, v := range valt.s {
-		offset, ok := w.symbols[v]
+		index, ok := w.symbols[v]
 		if !ok {
 			return errors.Errorf("symbol entry for %q does not exist", v)
 		}
-		w.buf2.putBE32(offset)
+		w.buf2.putBE32(index)
 	}
 
 	w.buf1.reset()
@@ -531,9 +539,11 @@ type Reader struct {
 	// the block has been unmapped.
 	symbols map[uint32]string
 
-	dec *DecoderV1
+	dec *Decoder
 
 	crc32 hash.Hash32
+
+	version int
 }
 
 var (
@@ -563,20 +573,24 @@ func (b realByteSlice) Sub(start, end int) ByteSlice {
 }
 
 // NewReader returns a new IndexReader on the given byte slice.
-func NewReader(b ByteSlice) (*Reader, error) {
-	return newReader(b, nil)
+func NewReader(b ByteSlice, version int) (*Reader, error) {
+	return newReader(b, nil, version)
 }
 
 // NewFileReader returns a new index reader against the given index file.
-func NewFileReader(path string) (*Reader, error) {
+func NewFileReader(path string, version int) (*Reader, error) {
 	f, err := fileutil.OpenMmapFile(path)
 	if err != nil {
 		return nil, err
 	}
-	return newReader(realByteSlice(f.Bytes()), f)
+	return newReader(realByteSlice(f.Bytes()), f, version)
 }
 
-func newReader(b ByteSlice, c io.Closer) (*Reader, error) {
+func newReader(b ByteSlice, c io.Closer, version int) (*Reader, error) {
+	if version != 1 && version != 2 {
+		return nil, errors.Errorf("unexpected file version %d", version)
+	}
+
 	r := &Reader{
 		b:        b,
 		c:        c,
@@ -584,7 +598,9 @@ func newReader(b ByteSlice, c io.Closer) (*Reader, error) {
 		labels:   map[string]uint32{},
 		postings: map[labels.Label]uint32{},
 		crc32:    newCRC32(),
+		version:  version,
 	}
+
 	// Verify magic number.
 	if b.Len() < 4 {
 		return nil, errors.Wrap(errInvalidSize, "index header")
@@ -622,7 +638,7 @@ func newReader(b ByteSlice, c io.Closer) (*Reader, error) {
 		return nil, errors.Wrap(err, "read postings table")
 	}
 
-	r.dec = &DecoderV1{symbols: r.symbols}
+	r.dec = &Decoder{symbols: r.symbols}
 
 	return r, nil
 }
@@ -660,7 +676,7 @@ func (r *Reader) readTOC() error {
 	d := decbuf{b: b[:len(b)-4]}
 
 	if d.crc32() != expCRC {
-		return errInvalidChecksum
+		return errors.Wrap(errInvalidChecksum, "read TOC")
 	}
 
 	r.toc.symbols = d.be64()
@@ -742,14 +758,23 @@ func (r *Reader) readSymbols(off int) error {
 		basePos = uint32(off) + 4
 		nextPos = basePos + uint32(origLen-d.len())
 	)
+
+	if r.version == 2 {
+		nextPos = 0
+	}
+
 	for d.err() == nil && d.len() > 0 && cnt > 0 {
 		s := d.uvarintStr()
 		r.symbols[uint32(nextPos)] = s
 
-		nextPos = basePos + uint32(origLen-d.len())
+		if r.version == 2 {
+			nextPos++
+		} else {
+			nextPos = basePos + uint32(origLen-d.len())
+		}
 		cnt--
 	}
-	return d.err()
+	return errors.Wrap(d.err(), "read symbols")
 }
 
 // readOffsetTable reads an offset table at the given position calls f for each
@@ -852,13 +877,17 @@ func (r *Reader) LabelIndices() ([][]string, error) {
 	return res, nil
 }
 
-// Series the series with the given ID and writes its labels and chunks into lbls and chks.
+// Series reads the series with the given ID and writes its labels and chunks into lbls and chks.
 func (r *Reader) Series(id uint64, lbls *labels.Labels, chks *[]chunks.Meta) error {
-	d := r.decbufUvarintAt(int(id))
+	offset := id
+	if r.version == 2 {
+		offset = 16 * id
+	}
+	d := r.decbufUvarintAt(int(offset))
 	if d.err() != nil {
 		return d.err()
 	}
-	return r.dec.Series(d.get(), lbls, chks)
+	return errors.Wrap(r.dec.Series(d.get(), lbls, chks), "read series")
 }
 
 // Postings returns a postings list for the given label pair.
@@ -955,15 +984,15 @@ func (t *serializedStringTuples) At(i int) ([]string, error) {
 	return res, nil
 }
 
-// DecoderV1 provides decoding methods for the v1 index file format.
+// Decoder provides decoding methods for the v1 and v2 index file format.
 //
 // It currently does not contain decoding methods for all entry types but can be extended
 // by them if there's demand.
-type DecoderV1 struct {
+type Decoder struct {
 	symbols map[uint32]string
 }
 
-func (dec *DecoderV1) lookupSymbol(o uint32) (string, error) {
+func (dec *Decoder) lookupSymbol(o uint32) (string, error) {
 	s, ok := dec.symbols[o]
 	if !ok {
 		return "", errors.Errorf("unknown symbol offset %d", o)
@@ -973,12 +1002,12 @@ func (dec *DecoderV1) lookupSymbol(o uint32) (string, error) {
 
 // SetSymbolTable set the symbol table to be used for lookups when decoding series
 // and label indices
-func (dec *DecoderV1) SetSymbolTable(t map[uint32]string) {
+func (dec *Decoder) SetSymbolTable(t map[uint32]string) {
 	dec.symbols = t
 }
 
 // Postings returns a postings list for b and its number of elements.
-func (dec *DecoderV1) Postings(b []byte) (int, Postings, error) {
+func (dec *Decoder) Postings(b []byte) (int, Postings, error) {
 	d := decbuf{b: b}
 	n := d.be32int()
 	l := d.get()
@@ -986,7 +1015,7 @@ func (dec *DecoderV1) Postings(b []byte) (int, Postings, error) {
 }
 
 // Series decodes a series entry from the given byte slice into lset and chks.
-func (dec *DecoderV1) Series(b []byte, lbls *labels.Labels, chks *[]chunks.Meta) error {
+func (dec *Decoder) Series(b []byte, lbls *labels.Labels, chks *[]chunks.Meta) error {
 	*lbls = (*lbls)[:0]
 	*chks = (*chks)[:0]
 
diff --git a/vendor/github.com/prometheus/tsdb/tombstones.go b/vendor/github.com/prometheus/tsdb/tombstones.go
index 0de3e1a99..8c760cdce 100644
--- a/vendor/github.com/prometheus/tsdb/tombstones.go
+++ b/vendor/github.com/prometheus/tsdb/tombstones.go
@@ -131,7 +131,7 @@ func readTombstones(dir string) (memTombstones, error) {
 		return nil, d.err()
 	}
 
-	// Verify checksum
+	// Verify checksum.
 	hash := newCRC32()
 	if _, err := hash.Write(d.get()); err != nil {
 		return nil, errors.Wrap(err, "write to hash")
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 2ac589b30..aa5d16654 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -800,40 +800,40 @@
 			"revisionTime": "2016-04-11T19:08:41Z"
 		},
 		{
-			"checksumSHA1": "C72p7MMwA94LrpqYD3dMcQEKHzY=",
+			"checksumSHA1": "XHNJVYnIBaFpQOOA4wTqjDbMkUo=",
 			"path": "github.com/prometheus/tsdb",
-			"revision": "07ef80820ef1250db82f9544f3fcf7f0f63ccee0",
-			"revisionTime": "2017-12-22T14:44:41Z"
+			"revision": "467948f3c3f2f6f4ed9881afba27dd3ae24393eb",
+			"revisionTime": "2018-01-18T08:32:54Z"
 		},
 		{
 			"checksumSHA1": "XTirmk6Pq5TBGIZEaN5VL4k3i1s=",
 			"path": "github.com/prometheus/tsdb/chunkenc",
-			"revision": "07ef80820ef1250db82f9544f3fcf7f0f63ccee0",
-			"revisionTime": "2017-12-22T14:44:41Z"
+			"revision": "467948f3c3f2f6f4ed9881afba27dd3ae24393eb",
+			"revisionTime": "2018-01-18T08:32:54Z"
 		},
 		{
 			"checksumSHA1": "+zsn1i8cqwgZXL8Bg6jDy32xjAo=",
 			"path": "github.com/prometheus/tsdb/chunks",
-			"revision": "07ef80820ef1250db82f9544f3fcf7f0f63ccee0",
-			"revisionTime": "2017-12-22T14:44:41Z"
+			"revision": "467948f3c3f2f6f4ed9881afba27dd3ae24393eb",
+			"revisionTime": "2018-01-18T08:32:54Z"
 		},
 		{
 			"checksumSHA1": "h49AAcJ5+iRBwCgbfQf+2T1E1ZE=",
 			"path": "github.com/prometheus/tsdb/fileutil",
-			"revision": "07ef80820ef1250db82f9544f3fcf7f0f63ccee0",
-			"revisionTime": "2017-12-22T14:44:41Z"
+			"revision": "467948f3c3f2f6f4ed9881afba27dd3ae24393eb",
+			"revisionTime": "2018-01-18T08:32:54Z"
 		},
 		{
-			"checksumSHA1": "y3lUn43gcc3HtYd20UDujyybGq4=",
+			"checksumSHA1": "yuiJaE3cAmZ/ws8NOfd56x36Sg4=",
 			"path": "github.com/prometheus/tsdb/index",
-			"revision": "07ef80820ef1250db82f9544f3fcf7f0f63ccee0",
-			"revisionTime": "2017-12-22T14:44:41Z"
+			"revision": "467948f3c3f2f6f4ed9881afba27dd3ae24393eb",
+			"revisionTime": "2018-01-18T08:32:54Z"
 		},
 		{
 			"checksumSHA1": "Va8HWvOFTwFeewZFadMAOzNGDps=",
 			"path": "github.com/prometheus/tsdb/labels",
-			"revision": "07ef80820ef1250db82f9544f3fcf7f0f63ccee0",
-			"revisionTime": "2017-12-22T14:44:41Z"
+			"revision": "467948f3c3f2f6f4ed9881afba27dd3ae24393eb",
+			"revisionTime": "2018-01-18T08:32:54Z"
 		},
 		{
 			"checksumSHA1": "5SYLEhADhdBVZAGPVHWggQl7H8k=",