diff --git a/bolt_arm64.go b/bolt_arm64.go
index 810dfd5..447bc19 100644
--- a/bolt_arm64.go
+++ b/bolt_arm64.go
@@ -1,3 +1,4 @@
+//go:build arm64
 // +build arm64
 
 package bbolt
diff --git a/bolt_mips64x.go b/bolt_mips64x.go
index dd8ffe1..a9385be 100644
--- a/bolt_mips64x.go
+++ b/bolt_mips64x.go
@@ -1,3 +1,4 @@
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 package bbolt
diff --git a/bolt_mipsx.go b/bolt_mipsx.go
index a669703..ed734ff 100644
--- a/bolt_mipsx.go
+++ b/bolt_mipsx.go
@@ -1,3 +1,4 @@
+//go:build mips || mipsle
 // +build mips mipsle
 
 package bbolt
diff --git a/bolt_ppc.go b/bolt_ppc.go
index 84e545e..e403f57 100644
--- a/bolt_ppc.go
+++ b/bolt_ppc.go
@@ -1,3 +1,4 @@
+//go:build ppc
 // +build ppc
 
 package bbolt
diff --git a/bolt_ppc64.go b/bolt_ppc64.go
index a761209..fcd8652 100644
--- a/bolt_ppc64.go
+++ b/bolt_ppc64.go
@@ -1,3 +1,4 @@
+//go:build ppc64
 // +build ppc64
 
 package bbolt
diff --git a/bolt_ppc64le.go b/bolt_ppc64le.go
index c830f2f..20234ac 100644
--- a/bolt_ppc64le.go
+++ b/bolt_ppc64le.go
@@ -1,3 +1,4 @@
+//go:build ppc64le
 // +build ppc64le
 
 package bbolt
diff --git a/bolt_riscv64.go b/bolt_riscv64.go
index c967613..060f30c 100644
--- a/bolt_riscv64.go
+++ b/bolt_riscv64.go
@@ -1,3 +1,4 @@
+//go:build riscv64
 // +build riscv64
 
 package bbolt
diff --git a/bolt_s390x.go b/bolt_s390x.go
index ff2a560..92d2755 100644
--- a/bolt_s390x.go
+++ b/bolt_s390x.go
@@ -1,3 +1,4 @@
+//go:build s390x
 // +build s390x
 
 package bbolt
diff --git a/bolt_unix.go b/bolt_unix.go
index 4e5f65c..757ae4d 100644
--- a/bolt_unix.go
+++ b/bolt_unix.go
@@ -1,3 +1,4 @@
+//go:build !windows && !plan9 && !solaris && !aix
 // +build !windows,!plan9,!solaris,!aix
 
 package bbolt
diff --git a/bolt_unix_aix.go b/bolt_unix_aix.go
index a64c16f..6dea429 100644
--- a/bolt_unix_aix.go
+++ b/bolt_unix_aix.go
@@ -1,3 +1,4 @@
+//go:build aix
 // +build aix
 
 package bbolt
diff --git a/boltsync_unix.go b/boltsync_unix.go
index 9587afe..81e09a5 100644
--- a/boltsync_unix.go
+++ b/boltsync_unix.go
@@ -1,3 +1,4 @@
+//go:build !windows && !plan9 && !linux && !openbsd
 // +build !windows,!plan9,!linux,!openbsd
 
 package bbolt
diff --git a/cmd/bbolt/main.go b/cmd/bbolt/main.go
index 4c7b885..42fd72c 100644
--- a/cmd/bbolt/main.go
+++ b/cmd/bbolt/main.go
@@ -7,7 +7,6 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"runtime"
@@ -1364,7 +1363,7 @@ func (cmd *BenchCommand) ParseFlags(args []string) (*BenchOptions, error) {
 
 	// Generate temp path if one is not passed in.
 	if options.Path == "" {
-		f, err := ioutil.TempFile("", "bolt-bench-")
+		f, err := os.CreateTemp("", "bolt-bench-")
 		if err != nil {
 			return nil, fmt.Errorf("temp file: %s", err)
 		}
@@ -1951,7 +1950,7 @@ func newCompactCommand(m *Main) *CompactCommand {
 func (cmd *CompactCommand) Run(args ...string) (err error) {
 	// Parse flags.
 	fs := flag.NewFlagSet("", flag.ContinueOnError)
-	fs.SetOutput(ioutil.Discard)
+	fs.SetOutput(io.Discard)
 	fs.StringVar(&cmd.DstPath, "o", "", "")
 	fs.Int64Var(&cmd.TxMaxSize, "tx-max-size", 65536, "")
 	if err := fs.Parse(args); err == flag.ErrHelp {
diff --git a/cmd/bbolt/main_test b/cmd/bbolt/main_test
index b4871ff..73da2c3 100644
--- a/cmd/bbolt/main_test
+++ b/cmd/bbolt/main_test
@@ -6,7 +6,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"strconv"
@@ -265,7 +264,7 @@ func NewMain() *Main {
 // MustOpen creates a Bolt database in a temporary location.
 func MustOpen(mode os.FileMode, options *bolt.Options) *DB {
 	// Create temporary path.
-	f, _ := ioutil.TempFile("", "bolt-")
+	f, _ := os.CreateTemp("", "bolt-")
 	f.Close()
 	os.Remove(f.Name())
 
diff --git a/db_test.go b/db_test.go
index 7af780b..f6f7de2 100644
--- a/db_test.go
+++ b/db_test.go
@@ -7,7 +7,6 @@ import (
 	"flag"
 	"fmt"
 	"hash/fnv"
-	"io/ioutil"
 	"log"
 	"math/rand"
 	"os"
@@ -158,7 +157,7 @@ func TestOpen_ErrVersionMismatch(t *testing.T) {
 	}
 
 	// Read data file.
-	buf, err := ioutil.ReadFile(path)
+	buf, err := os.ReadFile(path)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -168,7 +167,7 @@ func TestOpen_ErrVersionMismatch(t *testing.T) {
 	meta0.version++
 	meta1 := (*meta)(unsafe.Pointer(&buf[pageSize+pageHeaderSize]))
 	meta1.version++
-	if err := ioutil.WriteFile(path, buf, 0666); err != nil {
+	if err := os.WriteFile(path, buf, 0666); err != nil {
 		t.Fatal(err)
 	}
 
@@ -195,7 +194,7 @@ func TestOpen_ErrChecksum(t *testing.T) {
 	}
 
 	// Read data file.
-	buf, err := ioutil.ReadFile(path)
+	buf, err := os.ReadFile(path)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -205,7 +204,7 @@ func TestOpen_ErrChecksum(t *testing.T) {
 	meta0.pgid++
 	meta1 := (*meta)(unsafe.Pointer(&buf[pageSize+pageHeaderSize]))
 	meta1.pgid++
-	if err := ioutil.WriteFile(path, buf, 0666); err != nil {
+	if err := os.WriteFile(path, buf, 0666); err != nil {
 		t.Fatal(err)
 	}
 
@@ -643,7 +642,7 @@ func TestDB_Concurrent_WriteTo(t *testing.T) {
 	wg.Add(wtxs * rtxs)
 	f := func(tx *bolt.Tx) {
 		defer wg.Done()
-		f, err := ioutil.TempFile("", "bolt-")
+		f, err := os.CreateTemp("", "bolt-")
 		if err != nil {
 			panic(err)
 		}
@@ -1747,7 +1746,7 @@ func (db *DB) CopyTempFile() {
 
 // tempfile returns a temporary file path.
 func tempfile() string {
-	f, err := ioutil.TempFile("", "bolt-")
+	f, err := os.CreateTemp("", "bolt-")
 	if err != nil {
 		panic(err)
 	}
diff --git a/go.mod b/go.mod
index 96355a6..bfd6142 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module go.etcd.io/bbolt
 
-go 1.12
+go 1.17
 
 require golang.org/x/sys v0.0.0-20200923182605-d9f96fdee20d
diff --git a/manydbs_test.go b/manydbs_test.go
index b58fc1b..48bc211 100644
--- a/manydbs_test.go
+++ b/manydbs_test.go
@@ -2,7 +2,6 @@ package bbolt
 
 import (
 	"fmt"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"path/filepath"
@@ -12,7 +11,7 @@ import (
 func createDb(t *testing.T) (*DB, func()) {
 	// First, create a temporary directory to be used for the duration of
 	// this test.
-	tempDirName, err := ioutil.TempDir("", "bboltmemtest")
+	tempDirName, err := os.MkdirTemp("", "bboltmemtest")
 	if err != nil {
 		t.Fatalf("error creating temp dir: %v", err)
 	}
diff --git a/mlock_unix.go b/mlock_unix.go
index 6a6c7b3..7e578d4 100644
--- a/mlock_unix.go
+++ b/mlock_unix.go
@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package bbolt
diff --git a/unix_test.go b/unix_test.go
index 267eab1..ac06c4f 100644
--- a/unix_test.go
+++ b/unix_test.go
@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package bbolt_test