diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index dc9747e..12a8024 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -14,9 +14,9 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: '1.19.x'
+          go-version: '1.22.x'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v4
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.49.0
+          version: v1.57.2
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 447bf0f..1470758 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,7 +4,7 @@ jobs:
   unit:
     strategy:
       matrix:
-        go: [ "1.18.x", "1.19.x" ]
+        go: [ "1.21.x", "1.22.x" ]
     runs-on: ubuntu-latest
     name: Unit tests (Go ${{ matrix.go }})
     steps:
@@ -31,7 +31,7 @@ jobs:
   integration:
     strategy:
       matrix:
-        go: [ "1.18.x", "1.19.x" ]
+        go: [ "1.21.x", "1.22.x" ]
     runs-on: ubuntu-latest
     name: Integration tests (Go ${{ matrix.go }})
     steps:
diff --git a/go.mod b/go.mod
index 8fa4944..755b2d0 100644
--- a/go.mod
+++ b/go.mod
@@ -1,19 +1,20 @@
 module github.com/quic-go/qpack
 
-go 1.18
+go 1.21
 
 require (
 	github.com/onsi/ginkgo/v2 v2.2.0
 	github.com/onsi/gomega v1.20.1
-	golang.org/x/net v0.0.0-20220722155237-a158d28d115b
+	golang.org/x/exp v0.0.0-20240325151524-a685a6edb6d8
+	golang.org/x/net v0.22.0
 )
 
 require (
 	github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
 	github.com/google/go-cmp v0.5.8 // indirect
 	github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect
-	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
-	golang.org/x/text v0.3.7 // indirect
-	golang.org/x/tools v0.1.12 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/tools v0.19.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 781e7dc..eac0be3 100644
--- a/go.sum
+++ b/go.sum
@@ -7,6 +7,7 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 h1:p104kn46Q8WdvHunIJ9dAyjPVtrBPhSr3KT2yUst43I=
 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
 github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 h1:yAJXTCF9TqKcTiHJAE8dj7HMvPfh66eeA2JYW7eFpSE=
@@ -21,19 +22,23 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b h1:PxfKdU9lEEDYjdIzOtC4qFWgkU2rGHdKlKowJSMN9h0=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/exp v0.0.0-20240325151524-a685a6edb6d8 h1:aAcj0Da7eBAtrTp03QXWvm88pSyOt+UgdZw2BFZ+lEw=
+golang.org/x/exp v0.0.0-20240325151524-a685a6edb6d8/go.mod h1:CQ1k9gNrJ50XIzaKCRR2hssIjF07kZFEiieALBM/ARQ=
+golang.org/x/net v0.22.0 h1:9sGLhx7iRIHEiX0oAJ3MRZMUCElJgy7Br1nO+AMN3Tc=
+golang.org/x/net v0.22.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f h1:v4INt8xihDGvnrfjMDVXGxw9wrfxYyCjk0KbXjhR55s=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/tools v0.1.12 h1:VveCTK38A2rkS8ZqFY25HIDFscX5X9OoEhJd3quQmXU=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
+golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/tools v0.19.0 h1:tfGCXNR1OsFG+sVdLAitlpjAvD/I6dHDKnYrpEZUHkw=
+golang.org/x/tools v0.19.0/go.mod h1:qoJWxmGSIBmAeriMx19ogtrEPrGtDbPK634QFIcLAhc=
 google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
+google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/integrationtests/self/integration_test.go b/integrationtests/self/integration_test.go
index c973501..7acf3b5 100644
--- a/integrationtests/self/integration_test.go
+++ b/integrationtests/self/integration_test.go
@@ -3,7 +3,8 @@ package self
 import (
 	"bytes"
 	"fmt"
-	"math/rand"
+
+	"golang.org/x/exp/rand"
 
 	"github.com/quic-go/qpack"
 
@@ -11,22 +12,22 @@ import (
 	. "github.com/onsi/gomega"
 )
 
+func randomString(l int) string {
+	const charset = "abcdefghijklmnopqrstuvwxyz" +
+		"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	s := make([]byte, l)
+	for i := range s {
+		s[i] = charset[rand.Intn(len(charset))]
+	}
+	return string(s)
+}
+
 var _ = Describe("Self Tests", func() {
 	getEncoder := func() (*qpack.Encoder, *bytes.Buffer) {
 		output := &bytes.Buffer{}
 		return qpack.NewEncoder(output), output
 	}
 
-	randomString := func(l int) string {
-		const charset = "abcdefghijklmnopqrstuvwxyz" +
-			"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-		s := make([]byte, l)
-		for i := range s {
-			s[i] = charset[rand.Intn(len(charset))]
-		}
-		return string(s)
-	}
-
 	It("encodes and decodes a single header field", func() {
 		hf := qpack.HeaderField{
 			Name:  randomString(15),
diff --git a/integrationtests/self/self_suite_test.go b/integrationtests/self/self_suite_test.go
index 1906c86..36474e5 100644
--- a/integrationtests/self/self_suite_test.go
+++ b/integrationtests/self/self_suite_test.go
@@ -1,10 +1,11 @@
 package self
 
 import (
-	"math/rand"
 	"testing"
 	_ "unsafe"
 
+	"golang.org/x/exp/rand"
+
 	"github.com/quic-go/qpack"
 
 	. "github.com/onsi/ginkgo/v2"
@@ -17,7 +18,7 @@ func TestSelf(t *testing.T) {
 }
 
 var _ = BeforeSuite(func() {
-	rand.Seed(GinkgoRandomSeed())
+	rand.Seed(uint64(GinkgoRandomSeed()))
 })
 
 var staticTable []qpack.HeaderField