diff --git a/dictzip/dictzip.go b/dictzip/dictzip.go
index fe742a8..01aa80a 100644
--- a/dictzip/dictzip.go
+++ b/dictzip/dictzip.go
@@ -120,7 +120,7 @@ func NewReader(rs io.ReadSeekCloser) (*Reader, error) {
 
 	dz.offsets = make([]int64, blockCount+1)
 	dz.offsets[0] = int64(p)
-	for i := 0; i < blockCount; i++ {
+	for i := range blockCount {
 		dz.offsets[i+1] = dz.offsets[i] + int64(metadata[6+2*i]) + 256*int64(metadata[7+2*i])
 	}
 
diff --git a/go.mod b/go.mod
index 61cda60..e9207e2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/ilius/go-stardict/v2
 
-go 1.14
+go 1.22
 
 require (
 	github.com/gobwas/glob v0.2.3
diff --git a/murmur3/murmur128.go b/murmur3/murmur128.go
index 2c374a1..dc5bfa8 100644
--- a/murmur3/murmur128.go
+++ b/murmur3/murmur128.go
@@ -57,7 +57,7 @@ func (d *digest128) bmix(p []byte) (tail []byte) {
 	h1, h2 := d.h1, d.h2
 
 	nblocks := len(p) / 16
-	for i := 0; i < nblocks; i++ {
+	for i := range nblocks {
 		t := (*[2]uint64)(unsafe.Pointer(&p[i*16]))
 		k1, k2 := t[0], t[1]
 
diff --git a/murmur3/murmur_test.go b/murmur3/murmur_test.go
index 209d3ff..96bd38e 100644
--- a/murmur3/murmur_test.go
+++ b/murmur3/murmur_test.go
@@ -54,7 +54,7 @@ func bench128(b *testing.B, length int) {
 	buf := make([]byte, length)
 	b.SetBytes(int64(length))
 	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		Sum128(buf)
 	}
 }