diff --git a/go.mod b/go.mod
index 778954b3e..1063dfa37 100644
--- a/go.mod
+++ b/go.mod
@@ -25,7 +25,7 @@ require (
 	github.com/go-logfmt/logfmt v0.5.0
 	github.com/go-openapi/strfmt v0.19.11
 	github.com/go-openapi/validate v0.19.14 // indirect
-	github.com/gogo/protobuf v1.3.1
+	github.com/gogo/protobuf v1.3.2
 	github.com/golang/snappy v0.0.2
 	github.com/google/pprof v0.0.0-20201218002935-b9804c9f04c2
 	github.com/gophercloud/gophercloud v0.15.0
@@ -66,7 +66,7 @@ require (
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
 	golang.org/x/sys v0.0.0-20201223074533-0d417f636930
 	golang.org/x/time v0.0.0-20201208040808-7e3f01d25324
-	golang.org/x/tools v0.0.0-20201228162255-34cd474b9958
+	golang.org/x/tools v0.0.0-20210106214847-113979e3529a
 	google.golang.org/api v0.36.0
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 	gopkg.in/fsnotify/fsnotify.v1 v1.4.7
diff --git a/go.sum b/go.sum
index 09263a031..d383f9bfc 100644
--- a/go.sum
+++ b/go.sum
@@ -342,6 +342,8 @@ github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7a
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
 github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
+github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
+github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 github.com/golang/geo v0.0.0-20190916061304-5b978397cfec/go.mod h1:QZ0nwyI2jOfgRAoBvP+ab5aRr7c9x7lhGEJrKvBwjWI=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
@@ -531,6 +533,7 @@ github.com/karrick/godirwalk v1.8.0/go.mod h1:H5KPZjojv4lE+QYImBI8xVtrBRgYrIVsaR
 github.com/karrick/godirwalk v1.10.3/go.mod h1:RoGL9dQei4vP9ilrpETWE8CLOZ1kiN0LhBygSwrAsHA=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
+github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.4.0/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/compress v1.9.5/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
@@ -1093,13 +1096,14 @@ golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roY
 golang.org/x/tools v0.0.0-20200513201620-d5fe73897c97/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200515010526-7d3b6ebf133d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200828161849-5deb26317202/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201110124207-079ba7bd75cd/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201201161351-ac6f37ff4c2a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20201228162255-34cd474b9958 h1:8dEW6cGnUF2NIvtKDx8YsMBEw5pUrMEVUrU0jiPgmu8=
-golang.org/x/tools v0.0.0-20201228162255-34cd474b9958/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.0.0-20210106214847-113979e3529a h1:CB3a9Nez8M13wwlr/E2YtwoU+qYHKfC+JrDa45RXXoQ=
+golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/prompb/remote.pb.go b/prompb/remote.pb.go
index 2a5bd8c8e..b3cf44884 100644
--- a/prompb/remote.pb.go
+++ b/prompb/remote.pb.go
@@ -1011,10 +1011,7 @@ func (m *WriteRequest) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthRemote
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthRemote
 			}
 			if (iNdEx + skippy) > l {
@@ -1168,10 +1165,7 @@ func (m *ReadRequest) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthRemote
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthRemote
 			}
 			if (iNdEx + skippy) > l {
@@ -1256,10 +1250,7 @@ func (m *ReadResponse) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthRemote
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthRemote
 			}
 			if (iNdEx + skippy) > l {
@@ -1418,10 +1409,7 @@ func (m *Query) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthRemote
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthRemote
 			}
 			if (iNdEx + skippy) > l {
@@ -1506,10 +1494,7 @@ func (m *QueryResult) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthRemote
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthRemote
 			}
 			if (iNdEx + skippy) > l {
@@ -1613,10 +1598,7 @@ func (m *ChunkedReadResponse) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthRemote
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthRemote
 			}
 			if (iNdEx + skippy) > l {
diff --git a/prompb/types.pb.go b/prompb/types.pb.go
index 5e593b73d..e09215ada 100644
--- a/prompb/types.pb.go
+++ b/prompb/types.pb.go
@@ -1600,10 +1600,7 @@ func (m *MetricMetadata) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -1684,10 +1681,7 @@ func (m *Sample) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -1806,10 +1800,7 @@ func (m *TimeSeries) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -1924,10 +1915,7 @@ func (m *Label) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -2012,10 +2000,7 @@ func (m *Labels) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -2149,10 +2134,7 @@ func (m *LabelMatcher) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -2363,10 +2345,7 @@ func (m *ReadHints) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -2508,10 +2487,7 @@ func (m *Chunk) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
@@ -2630,10 +2606,7 @@ func (m *ChunkedSeries) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthTypes
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
diff --git a/vendor/github.com/gogo/protobuf/plugin/unmarshal/unmarshal.go b/vendor/github.com/gogo/protobuf/plugin/unmarshal/unmarshal.go
index 9a2374b56..fae67de4f 100644
--- a/vendor/github.com/gogo/protobuf/plugin/unmarshal/unmarshal.go
+++ b/vendor/github.com/gogo/protobuf/plugin/unmarshal/unmarshal.go
@@ -844,7 +844,7 @@ func (p *unmarshal) field(file *generator.FileDescriptor, msg *generator.Descrip
 			p.P(`return err`)
 			p.Out()
 			p.P(`}`)
-			p.P(`if skippy < 0 {`)
+			p.P(`if (skippy < 0) || (iNdEx + skippy) < 0 {`)
 			p.In()
 			p.P(`return ErrInvalidLength`, p.localName)
 			p.Out()
@@ -1484,12 +1484,7 @@ func (p *unmarshal) Generate(file *generator.FileDescriptor) {
 			p.P(`return err`)
 			p.Out()
 			p.P(`}`)
-			p.P(`if skippy < 0 {`)
-			p.In()
-			p.P(`return ErrInvalidLength`, p.localName)
-			p.Out()
-			p.P(`}`)
-			p.P(`if (iNdEx + skippy) < 0 {`)
+			p.P(`if (skippy < 0) || (iNdEx + skippy) < 0 {`)
 			p.In()
 			p.P(`return ErrInvalidLength`, p.localName)
 			p.Out()
@@ -1512,12 +1507,7 @@ func (p *unmarshal) Generate(file *generator.FileDescriptor) {
 		p.P(`return err`)
 		p.Out()
 		p.P(`}`)
-		p.P(`if skippy < 0 {`)
-		p.In()
-		p.P(`return ErrInvalidLength`, p.localName)
-		p.Out()
-		p.P(`}`)
-		p.P(`if (iNdEx + skippy) < 0 {`)
+		p.P(`if (skippy < 0) || (iNdEx + skippy) < 0 {`)
 		p.In()
 		p.P(`return ErrInvalidLength`, p.localName)
 		p.Out()
diff --git a/vendor/github.com/gogo/protobuf/proto/text_parser.go b/vendor/github.com/gogo/protobuf/proto/text_parser.go
index 1ce0be2fa..f85c0cc81 100644
--- a/vendor/github.com/gogo/protobuf/proto/text_parser.go
+++ b/vendor/github.com/gogo/protobuf/proto/text_parser.go
@@ -318,7 +318,7 @@ func unescape(s string) (ch string, tail string, err error) {
 		if i > utf8.MaxRune {
 			return "", "", fmt.Errorf(`\%c%s is not a valid Unicode code point`, r, ss)
 		}
-		return string(i), s, nil
+		return string(rune(i)), s, nil
 	}
 	return "", "", fmt.Errorf(`unknown escape \%c`, r)
 }
diff --git a/vendor/golang.org/x/tools/cmd/goimports/doc.go b/vendor/golang.org/x/tools/cmd/goimports/doc.go
index 7033e4d4c..f344d8014 100644
--- a/vendor/golang.org/x/tools/cmd/goimports/doc.go
+++ b/vendor/golang.org/x/tools/cmd/goimports/doc.go
@@ -1,3 +1,7 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 /*
 
 Command goimports updates your Go import lines,
diff --git a/vendor/golang.org/x/tools/go/ast/astutil/util.go b/vendor/golang.org/x/tools/go/ast/astutil/util.go
index 763062982..919d5305a 100644
--- a/vendor/golang.org/x/tools/go/ast/astutil/util.go
+++ b/vendor/golang.org/x/tools/go/ast/astutil/util.go
@@ -1,3 +1,7 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package astutil
 
 import "go/ast"
diff --git a/vendor/golang.org/x/tools/internal/gocommand/version.go b/vendor/golang.org/x/tools/internal/gocommand/version.go
index 60d45ac0e..0cebac6e6 100644
--- a/vendor/golang.org/x/tools/internal/gocommand/version.go
+++ b/vendor/golang.org/x/tools/internal/gocommand/version.go
@@ -16,9 +16,20 @@ func GoVersion(ctx context.Context, inv Invocation, r *Runner) (int, error) {
 	inv.Verb = "list"
 	inv.Args = []string{"-e", "-f", `{{context.ReleaseTags}}`}
 	inv.Env = append(append([]string{}, inv.Env...), "GO111MODULE=off")
-	// Unset any unneeded flags.
+	// Unset any unneeded flags, and remove them from BuildFlags, if they're
+	// present.
 	inv.ModFile = ""
 	inv.ModFlag = ""
+	var buildFlags []string
+	for _, flag := range inv.BuildFlags {
+		// Flags can be prefixed by one or two dashes.
+		f := strings.TrimPrefix(strings.TrimPrefix(flag, "-"), "-")
+		if strings.HasPrefix(f, "mod=") || strings.HasPrefix(f, "modfile=") {
+			continue
+		}
+		buildFlags = append(buildFlags, flag)
+	}
+	inv.BuildFlags = buildFlags
 	stdoutBytes, err := r.Run(ctx, inv)
 	if err != nil {
 		return 0, err
diff --git a/vendor/golang.org/x/tools/internal/imports/mod.go b/vendor/golang.org/x/tools/internal/imports/mod.go
index ce3269a43..901449a82 100644
--- a/vendor/golang.org/x/tools/internal/imports/mod.go
+++ b/vendor/golang.org/x/tools/internal/imports/mod.go
@@ -1,3 +1,7 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package imports
 
 import (
diff --git a/vendor/golang.org/x/tools/internal/imports/mod_cache.go b/vendor/golang.org/x/tools/internal/imports/mod_cache.go
index 5b4f03acc..18dada495 100644
--- a/vendor/golang.org/x/tools/internal/imports/mod_cache.go
+++ b/vendor/golang.org/x/tools/internal/imports/mod_cache.go
@@ -1,3 +1,7 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package imports
 
 import (
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 11f070a44..6c03f73b8 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -179,7 +179,7 @@ github.com/go-openapi/swag
 github.com/go-openapi/validate
 # github.com/go-stack/stack v1.8.0
 github.com/go-stack/stack
-# github.com/gogo/protobuf v1.3.1
+# github.com/gogo/protobuf v1.3.2
 ## explicit
 github.com/gogo/protobuf/gogoproto
 github.com/gogo/protobuf/plugin/compare
@@ -535,7 +535,7 @@ golang.org/x/text/width
 # golang.org/x/time v0.0.0-20201208040808-7e3f01d25324
 ## explicit
 golang.org/x/time/rate
-# golang.org/x/tools v0.0.0-20201228162255-34cd474b9958
+# golang.org/x/tools v0.0.0-20210106214847-113979e3529a
 ## explicit
 golang.org/x/tools/cmd/goimports
 golang.org/x/tools/go/ast/astutil