diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b95d5e4a4..ee9a6dd775 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,14 @@
+## 2.4.2 / 2018-09-21
+
+ The last release didn't have bugfix included due to a vendoring error.
+
+ * [BUGFIX] Handle WAL corruptions properly prometheus/tsdb#389
+ * [BUGFIX] Handle WAL migrations correctly on Windows prometheus/tsdb#392
+
 ## 2.4.1 / 2018-09-19
 
 * [ENHANCEMENT] New TSDB metrics prometheus/tsdb#375 prometheus/tsdb#363
 * [BUGFIX] Render UI correctly for Windows #4616
-* [BUGFIX] Handle WAL corruptions properly prometheus/tsdb#389
 
 ## 2.4.0 / 2018-09-11
 
diff --git a/VERSION b/VERSION
index 005119baaa..8e8299dcc0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.4.1
+2.4.2
diff --git a/vendor/github.com/prometheus/tsdb/block.go b/vendor/github.com/prometheus/tsdb/block.go
index 342a8d0205..7c4ccf0dce 100644
--- a/vendor/github.com/prometheus/tsdb/block.go
+++ b/vendor/github.com/prometheus/tsdb/block.go
@@ -504,10 +504,13 @@ Outer:
 func (pb *Block) CleanTombstones(dest string, c Compactor) (*ulid.ULID, error) {
 	numStones := 0
 
-	pb.tombstones.Iter(func(id uint64, ivs Intervals) error {
+	if err := pb.tombstones.Iter(func(id uint64, ivs Intervals) error {
 		numStones += len(ivs)
 		return nil
-	})
+	}); err != nil {
+		// This should never happen, as the iteration function only returns nil.
+		panic(err)
+	}
 	if numStones == 0 {
 		return nil, nil
 	}
diff --git a/vendor/github.com/prometheus/tsdb/checkpoint.go b/vendor/github.com/prometheus/tsdb/checkpoint.go
index d988d35615..f45f3791f0 100644
--- a/vendor/github.com/prometheus/tsdb/checkpoint.go
+++ b/vendor/github.com/prometheus/tsdb/checkpoint.go
@@ -109,6 +109,10 @@ func Checkpoint(logger log.Logger, w *wal.WAL, m, n int, keep func(id uint64) bo
 	stats := &CheckpointStats{}
 
 	var sr io.Reader
+	// We close everything explicitly because Windows needs files to be
+	// closed before being deleted. But we also have defer so that we close
+	// files if there is an error somewhere.
+	var closers []io.Closer
 	{
 		lastFn, k, err := LastCheckpoint(w.Dir())
 		if err != nil && err != ErrNotFound {
@@ -126,6 +130,7 @@ func Checkpoint(logger log.Logger, w *wal.WAL, m, n int, keep func(id uint64) bo
 				return nil, errors.Wrap(err, "open last checkpoint")
 			}
 			defer last.Close()
+			closers = append(closers, last)
 			sr = last
 		}
 
@@ -134,6 +139,7 @@ func Checkpoint(logger log.Logger, w *wal.WAL, m, n int, keep func(id uint64) bo
 			return nil, errors.Wrap(err, "create segment reader")
 		}
 		defer segsr.Close()
+		closers = append(closers, segsr)
 
 		if sr != nil {
 			sr = io.MultiReader(sr, segsr)
@@ -263,6 +269,9 @@ func Checkpoint(logger log.Logger, w *wal.WAL, m, n int, keep func(id uint64) bo
 	if err := fileutil.Replace(cpdirtmp, cpdir); err != nil {
 		return nil, errors.Wrap(err, "rename checkpoint directory")
 	}
+	if err := closeAll(closers...); err != nil {
+		return stats, errors.Wrap(err, "close opened files")
+	}
 	if err := w.Truncate(n + 1); err != nil {
 		// If truncating fails, we'll just try again at the next checkpoint.
 		// Leftover segments will just be ignored in the future if there's a checkpoint
diff --git a/vendor/github.com/prometheus/tsdb/compact.go b/vendor/github.com/prometheus/tsdb/compact.go
index 1b8f20fa53..3f5fa367c6 100644
--- a/vendor/github.com/prometheus/tsdb/compact.go
+++ b/vendor/github.com/prometheus/tsdb/compact.go
@@ -452,6 +452,7 @@ func (c *LeveledCompactor) write(dest string, meta *BlockMeta, blocks ...BlockRe
 	if err != nil {
 		return errors.Wrap(err, "open chunk writer")
 	}
+	defer chunkw.Close()
 	// Record written chunk sizes on level 1 compactions.
 	if meta.Compaction.Level == 1 {
 		chunkw = &instrumentedChunkWriter{
@@ -466,6 +467,7 @@ func (c *LeveledCompactor) write(dest string, meta *BlockMeta, blocks ...BlockRe
 	if err != nil {
 		return errors.Wrap(err, "open index writer")
 	}
+	defer indexw.Close()
 
 	if err := c.populateBlock(blocks, meta, indexw, chunkw); err != nil {
 		return errors.Wrap(err, "write compaction")
@@ -475,6 +477,10 @@ func (c *LeveledCompactor) write(dest string, meta *BlockMeta, blocks ...BlockRe
 		return errors.Wrap(err, "write merged meta")
 	}
 
+	// We are explicitly closing them here to check for error even
+	// though these are covered under defer. This is because in Windows,
+	// you cannot delete these unless they are closed and the defer is to
+	// make sure they are closed if the function exits due to an error above.
 	if err = chunkw.Close(); err != nil {
 		return errors.Wrap(err, "close chunk writer")
 	}
@@ -626,7 +632,9 @@ func (c *LeveledCompactor) populateBlock(blocks []BlockReader, meta *BlockMeta,
 		}
 
 		for _, chk := range chks {
-			c.chunkPool.Put(chk.Chunk)
+			if err := c.chunkPool.Put(chk.Chunk); err != nil {
+				return errors.Wrap(err, "put chunk")
+			}
 		}
 
 		for _, l := range lset {
diff --git a/vendor/github.com/prometheus/tsdb/fileutil/fileutil.go b/vendor/github.com/prometheus/tsdb/fileutil/fileutil.go
index 2158bfd265..1154e7307b 100644
--- a/vendor/github.com/prometheus/tsdb/fileutil/fileutil.go
+++ b/vendor/github.com/prometheus/tsdb/fileutil/fileutil.go
@@ -48,7 +48,7 @@ func Rename(from, to string) error {
 // It is not atomic.
 func Replace(from, to string) error {
 	if err := os.RemoveAll(to); err != nil {
-		return nil
+		return err
 	}
 	if err := os.Rename(from, to); err != nil {
 		return err
diff --git a/vendor/github.com/prometheus/tsdb/head.go b/vendor/github.com/prometheus/tsdb/head.go
index b342c8f57a..bc8cdfbe4b 100644
--- a/vendor/github.com/prometheus/tsdb/head.go
+++ b/vendor/github.com/prometheus/tsdb/head.go
@@ -793,7 +793,7 @@ func (h *Head) gc() {
 	symbols := make(map[string]struct{})
 	values := make(map[string]stringset, len(h.values))
 
-	h.postings.Iter(func(t labels.Label, _ index.Postings) error {
+	if err := h.postings.Iter(func(t labels.Label, _ index.Postings) error {
 		symbols[t.Name] = struct{}{}
 		symbols[t.Value] = struct{}{}
 
@@ -804,7 +804,10 @@ func (h *Head) gc() {
 		}
 		ss.set(t.Value)
 		return nil
-	})
+	}); err != nil {
+		// This should never happen, as the iteration function only returns nil.
+		panic(err)
+	}
 
 	h.symMtx.Lock()
 
diff --git a/vendor/github.com/prometheus/tsdb/index/index.go b/vendor/github.com/prometheus/tsdb/index/index.go
index c58ff6ea83..c75796d734 100644
--- a/vendor/github.com/prometheus/tsdb/index/index.go
+++ b/vendor/github.com/prometheus/tsdb/index/index.go
@@ -271,7 +271,9 @@ func (w *Writer) AddSeries(ref uint64, lset labels.Labels, chunks ...chunks.Meta
 	}
 	// We add padding to 16 bytes to increase the addressable space we get through 4 byte
 	// series references.
-	w.addPadding(16)
+	if err := w.addPadding(16); err != nil {
+		return errors.Errorf("failed to write padding bytes: %v", err)
+	}
 
 	if w.pos%16 != 0 {
 		return errors.Errorf("series write not 16-byte aligned at %d", w.pos)
diff --git a/vendor/github.com/prometheus/tsdb/tombstones.go b/vendor/github.com/prometheus/tsdb/tombstones.go
index d4a3d0ef1b..ad820a05fb 100644
--- a/vendor/github.com/prometheus/tsdb/tombstones.go
+++ b/vendor/github.com/prometheus/tsdb/tombstones.go
@@ -16,12 +16,13 @@ package tsdb
 import (
 	"encoding/binary"
 	"fmt"
-	"github.com/pkg/errors"
 	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sync"
+
+	"github.com/pkg/errors"
 )
 
 const tombstoneFilename = "tombstones"
@@ -72,7 +73,7 @@ func writeTombstoneFile(dir string, tr TombstoneReader) error {
 
 	mw := io.MultiWriter(f, hash)
 
-	tr.Iter(func(ref uint64, ivs Intervals) error {
+	if err := tr.Iter(func(ref uint64, ivs Intervals) error {
 		for _, iv := range ivs {
 			buf.reset()
 
@@ -86,7 +87,9 @@ func writeTombstoneFile(dir string, tr TombstoneReader) error {
 			}
 		}
 		return nil
-	})
+	}); err != nil {
+		return fmt.Errorf("error writing tombstones: %v", err)
+	}
 
 	_, err = f.Write(hash.Sum(nil))
 	if err != nil {
diff --git a/vendor/github.com/prometheus/tsdb/wal.go b/vendor/github.com/prometheus/tsdb/wal.go
index ff978766cc..59206d8d07 100644
--- a/vendor/github.com/prometheus/tsdb/wal.go
+++ b/vendor/github.com/prometheus/tsdb/wal.go
@@ -723,6 +723,13 @@ func (w *SegmentWAL) run(interval time.Duration) {
 
 // Close syncs all data and closes the underlying resources.
 func (w *SegmentWAL) Close() error {
+	// Make sure you can call Close() multiple times.
+	select {
+	case <-w.stopc:
+		return nil // Already closed.
+	default:
+	}
+
 	close(w.stopc)
 	<-w.donec
 
@@ -735,10 +742,12 @@ func (w *SegmentWAL) Close() error {
 	// On opening, a WAL must be fully consumed once. Afterwards
 	// only the current segment will still be open.
 	if hf := w.head(); hf != nil {
-		return errors.Wrapf(hf.Close(), "closing WAL head %s", hf.Name())
+		if err := hf.Close(); err != nil {
+			return errors.Wrapf(err, "closing WAL head %s", hf.Name())
+		}
 	}
 
-	return w.dirFile.Close()
+	return errors.Wrapf(w.dirFile.Close(), "closing WAL dir %s", w.dirFile.Name())
 }
 
 const (
@@ -1260,6 +1269,7 @@ func MigrateWAL(logger log.Logger, dir string) (err error) {
 	if err != nil {
 		return errors.Wrap(err, "open new WAL")
 	}
+
 	// It should've already been closed as part of the previous finalization.
 	// Do it once again in case of prior errors.
 	defer func() {
@@ -1306,6 +1316,12 @@ func MigrateWAL(logger log.Logger, dir string) (err error) {
 	if err != nil {
 		return errors.Wrap(err, "write new entries")
 	}
+	// We explicitly close even when there is a defer for Windows to be
+	// able to delete it. The defer is in place to close it in-case there
+	// are errors above.
+	if err := w.Close(); err != nil {
+		return errors.Wrap(err, "close old WAL")
+	}
 	if err := repl.Close(); err != nil {
 		return errors.Wrap(err, "close new WAL")
 	}
diff --git a/vendor/github.com/prometheus/tsdb/wal/wal.go b/vendor/github.com/prometheus/tsdb/wal/wal.go
index 0e95ba2a79..aa52738fa2 100644
--- a/vendor/github.com/prometheus/tsdb/wal/wal.go
+++ b/vendor/github.com/prometheus/tsdb/wal/wal.go
@@ -255,15 +255,17 @@ Loop:
 
 // Repair attempts to repair the WAL based on the error.
 // It discards all data after the corruption.
-func (w *WAL) Repair(err error) error {
+func (w *WAL) Repair(origErr error) error {
 	// We could probably have a mode that only discards torn records right around
 	// the corruption to preserve as data much as possible.
 	// But that's not generally applicable if the records have any kind of causality.
 	// Maybe as an extra mode in the future if mid-WAL corruptions become
 	// a frequent concern.
+	err := errors.Cause(origErr) // So that we can pick up errors even if wrapped.
+
 	cerr, ok := err.(*CorruptionErr)
 	if !ok {
-		return errors.New("cannot handle error")
+		return errors.Wrap(origErr, "cannot handle error")
 	}
 	if cerr.Segment < 0 {
 		return errors.New("corruption error does not specify position")
@@ -283,6 +285,15 @@ func (w *WAL) Repair(err error) error {
 		if s.n <= cerr.Segment {
 			continue
 		}
+		if w.segment.i == s.n {
+			// The active segment needs to be removed,
+			// close it first (Windows!). Can be closed safely
+			// as we set the current segment to repaired file
+			// below.
+			if err := w.segment.Close(); err != nil {
+				return errors.Wrap(err, "close active segment")
+			}
+		}
 		if err := os.Remove(filepath.Join(w.dir, s.s)); err != nil {
 			return errors.Wrap(err, "delete segment")
 		}
@@ -310,6 +321,7 @@ func (w *WAL) Repair(err error) error {
 		return errors.Wrap(err, "open segment")
 	}
 	defer f.Close()
+
 	r := NewReader(bufio.NewReader(f))
 
 	for r.Next() {
@@ -317,8 +329,14 @@ func (w *WAL) Repair(err error) error {
 			return errors.Wrap(err, "insert record")
 		}
 	}
-	// We expect an error here, so nothing to handle.
+	// We expect an error here from r.Err(), so nothing to handle.
 
+	// We explicitly close even when there is a defer for Windows to be
+	// able to delete it. The defer is in place to close it in-case there
+	// are errors above.
+	if err := f.Close(); err != nil {
+		return errors.Wrap(err, "close corrupted file")
+	}
 	if err := os.Remove(tmpfn); err != nil {
 		return errors.Wrap(err, "delete corrupted segment")
 	}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index c145f77eed..8f555776d5 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -841,46 +841,46 @@
 			"revisionTime": "2016-04-11T19:08:41Z"
 		},
 		{
-			"checksumSHA1": "E6jWeQZVEyeMLNq4ceHx9NRw4B8=",
+			"checksumSHA1": "JLELG+wyXa02O8G/RTLpfPijOE8=",
 			"path": "github.com/prometheus/tsdb",
-			"revision": "dfcb7d0d5034b97de2abdf5369f4813e7fb7c07c",
-			"revisionTime": "2018-09-19T06:47:24Z"
+			"revision": "9c8ca47399a7f53f57b440464c103f5067e9b7b6",
+			"revisionTime": "2018-09-21T05:31:22Z"
 		},
 		{
 			"checksumSHA1": "QI0UME2olSr4kH6Z8UkpffM59Mc=",
 			"path": "github.com/prometheus/tsdb/chunkenc",
-			"revision": "06f01d45ad2ca2853c9dc1a0d5db6c75c8af6a5a",
-			"revisionTime": "2018-08-07T11:25:08Z"
+			"revision": "9c8ca47399a7f53f57b440464c103f5067e9b7b6",
+			"revisionTime": "2018-09-21T05:31:22Z"
 		},
 		{
 			"checksumSHA1": "+5bPifRe479zdFeTYhZ+CZRLMgw=",
 			"path": "github.com/prometheus/tsdb/chunks",
-			"revision": "06f01d45ad2ca2853c9dc1a0d5db6c75c8af6a5a",
-			"revisionTime": "2018-08-07T11:25:08Z"
+			"revision": "9c8ca47399a7f53f57b440464c103f5067e9b7b6",
+			"revisionTime": "2018-09-21T05:31:22Z"
 		},
 		{
-			"checksumSHA1": "bL3t5K2Q8e1GuM6gy5PAJ05go14=",
+			"checksumSHA1": "gOTpgLnuc2Ygwof6pCpLVedz00I=",
 			"path": "github.com/prometheus/tsdb/fileutil",
-			"revision": "06f01d45ad2ca2853c9dc1a0d5db6c75c8af6a5a",
-			"revisionTime": "2018-08-07T11:25:08Z"
+			"revision": "9c8ca47399a7f53f57b440464c103f5067e9b7b6",
+			"revisionTime": "2018-09-21T05:31:22Z"
 		},
 		{
-			"checksumSHA1": "AZGFK4UtJe8/j8pHqGTNQ8wu27g=",
+			"checksumSHA1": "dd5JqbMKbRKI6XlGzrvEAuMUJY4=",
 			"path": "github.com/prometheus/tsdb/index",
-			"revision": "06f01d45ad2ca2853c9dc1a0d5db6c75c8af6a5a",
-			"revisionTime": "2018-08-07T11:25:08Z"
+			"revision": "9c8ca47399a7f53f57b440464c103f5067e9b7b6",
+			"revisionTime": "2018-09-21T05:31:22Z"
 		},
 		{
 			"checksumSHA1": "Va8HWvOFTwFeewZFadMAOzNGDps=",
 			"path": "github.com/prometheus/tsdb/labels",
-			"revision": "06f01d45ad2ca2853c9dc1a0d5db6c75c8af6a5a",
-			"revisionTime": "2018-08-07T11:25:08Z"
+			"revision": "9c8ca47399a7f53f57b440464c103f5067e9b7b6",
+			"revisionTime": "2018-09-21T05:31:22Z"
 		},
 		{
-			"checksumSHA1": "6GXK7RnUngyM9OT/M2uzv8T3DOY=",
+			"checksumSHA1": "/NURBB5JOqg7fhWrVq8R8Sl3dAI=",
 			"path": "github.com/prometheus/tsdb/wal",
-			"revision": "06f01d45ad2ca2853c9dc1a0d5db6c75c8af6a5a",
-			"revisionTime": "2018-08-07T11:25:08Z"
+			"revision": "9c8ca47399a7f53f57b440464c103f5067e9b7b6",
+			"revisionTime": "2018-09-21T05:31:22Z"
 		},
 		{
 			"checksumSHA1": "5SYLEhADhdBVZAGPVHWggQl7H8k=",