diff --git a/s3/README.md b/s3/README.md
index 4134fcbb..5dd02bfe 100644
--- a/s3/README.md
+++ b/s3/README.md
@@ -74,13 +74,22 @@ err := store.Set("my-key", []byte("my-value"))
 Or, call `SetWithChecksum()` to create an object with checksum to
 ask S3 server to verify data integrity on server side:
 
-> Currently only 4 algorithm are supported: `CRC32`, `CRC32C`, `SHA1`, `SHA256`.
+> Currently 4 algorithm are supported:
+>   - types.ChecksumAlgorithmCrc32 (`CRC32`)
+>   - types.ChecksumAlgorithmCrc32c (`CRC32C`)
+>   - types.ChecksumAlgorithmSha1 (`SHA1`)
+>   - types.ChecksumAlgorithmSha256 (`SHA256`)
+>
 > For more information, see [PutObjectInput](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#PutObjectInput).
 
 ```go
 val := []byte("my-value")
 sha256sum := sha256.New().Sum256(val)
-checksum := map[string][]byte{"SHA256": sha256sum}
+
+// import "github.com/aws/aws-sdk-go-v2/service/s3/types"
+checksum  = map[types.ChecksumAlgorithm][]byte{
+    types.ChecksumAlgorithmSha256: sha256sum,
+}
 
 err := store.SetWithChecksum("my-key", []byte("my-value"), checksum)
 ```
diff --git a/s3/s3_methods.go b/s3/s3_methods.go
index 6307ae4a..65d96183 100644
--- a/s3/s3_methods.go
+++ b/s3/s3_methods.go
@@ -2,20 +2,26 @@ package s3
 
 import (
 	"bytes"
+	"encoding/hex"
 	"fmt"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/service/s3"
+	"github.com/aws/aws-sdk-go-v2/service/s3/types"
 )
 
 // Additional methods for S3, but not required by gofiber Storage interface.
 
 // SetWithChecksum sets key with value and checksum.
 // Key of `checksum` map is algorithm in upper cases, value is the checksum.
-// Currently only 4 algorithm are supported: `CRC32`, `CRC32C`, `SHA1`, `SHA256`.
+// Currently only 4 algorithm are supported:
+//   - types.ChecksumAlgorithmCrc32 (`CRC32`)
+//   - types.ChecksumAlgorithmCrc32c (`CRC32C`)
+//   - types.ChecksumAlgorithmSha1 (`SHA1`)
+//   - types.ChecksumAlgorithmSha256 (`SHA256`)
 //
 // For more information, see [PutObjectInput](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#PutObjectInput).
-func (s *Storage) SetWithChecksum(key string, val []byte, checksum map[string][]byte) error {
+func (s *Storage) SetWithChecksum(key string, val []byte, checksum map[types.ChecksumAlgorithm][]byte) error {
 	if len(key) <= 0 {
 		return nil
 	}
@@ -31,14 +37,14 @@ func (s *Storage) SetWithChecksum(key string, val []byte, checksum map[string][]
 
 	for alg, sum := range checksum {
 		switch alg {
-		case "CRC32":
-			poi.ChecksumCRC32 = aws.String(fmt.Sprintf("%x", sum))
-		case "CRC32C":
-			poi.ChecksumCRC32C = aws.String(fmt.Sprintf("%x", sum))
-		case "SHA1":
-			poi.ChecksumSHA1 = aws.String(fmt.Sprintf("%x", sum))
-		case "SHA256":
-			poi.ChecksumSHA256 = aws.String(fmt.Sprintf("%x", sum))
+		case types.ChecksumAlgorithmCrc32:
+			poi.ChecksumCRC32 = aws.String(hex.EncodeToString(sum))
+		case types.ChecksumAlgorithmCrc32c:
+			poi.ChecksumCRC32C = aws.String(hex.EncodeToString(sum))
+		case types.ChecksumAlgorithmSha1:
+			poi.ChecksumSHA1 = aws.String(hex.EncodeToString(sum))
+		case types.ChecksumAlgorithmSha256:
+			poi.ChecksumSHA256 = aws.String(hex.EncodeToString(sum))
 		default:
 			return fmt.Errorf("invalid checksum algorithm: %s", alg)
 		}
diff --git a/s3/s3_methods_test.go b/s3/s3_methods_test.go
index 0a390225..a43aa04b 100644
--- a/s3/s3_methods_test.go
+++ b/s3/s3_methods_test.go
@@ -4,6 +4,7 @@ import (
 	"crypto/sha256"
 	"testing"
 
+	"github.com/aws/aws-sdk-go-v2/service/s3/types"
 	"github.com/stretchr/testify/require"
 )
 
@@ -12,9 +13,12 @@ func Test_S3_SetWithChecksum(t *testing.T) {
 		key       = "john"
 		val       = []byte("doe")
 		sha256sum = sha256.New().Sum(val)
+		checksum  = map[types.ChecksumAlgorithm][]byte{
+			types.ChecksumAlgorithmSha256: sha256sum,
+		}
 	)
 
-	err := testStore.SetWithChecksum(key, val, map[string][]byte{"SHA256": sha256sum})
+	err := testStore.SetWithChecksum(key, val, checksum)
 	require.NoError(t, err)
 
 	result, err := testStore.Get(key)