diff --git a/json-smart/src/main/java/net/minidev/json/parser/JSONParserInputStream.java b/json-smart/src/main/java/net/minidev/json/parser/JSONParserInputStream.java
index 77d93e9..b991274 100644
--- a/json-smart/src/main/java/net/minidev/json/parser/JSONParserInputStream.java
+++ b/json-smart/src/main/java/net/minidev/json/parser/JSONParserInputStream.java
@@ -18,6 +18,7 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.UnsupportedEncodingException;
+import java.nio.charset.StandardCharsets;
 
 import net.minidev.json.writer.JsonReaderI;
 
@@ -39,7 +40,7 @@ public JSONParserInputStream(int permissiveMode) {
 	 * @throws UnsupportedEncodingException 
 	 */
 	public Object parse(InputStream in) throws ParseException, UnsupportedEncodingException {
-		InputStreamReader i2 = new InputStreamReader(in, "utf8");
+		InputStreamReader i2 = new InputStreamReader(in, StandardCharsets.UTF_8);
 		return super.parse(i2);
 	}
 
@@ -48,7 +49,7 @@ public Object parse(InputStream in) throws ParseException, UnsupportedEncodingEx
 	 * generated by a ContainerFactory
 	 */
 	public <T> T parse(InputStream in, JsonReaderI<T> mapper) throws ParseException, UnsupportedEncodingException {
-		InputStreamReader i2 = new InputStreamReader(in, "utf8");
+		InputStreamReader i2 = new InputStreamReader(in, StandardCharsets.UTF_8);
 		//
 		return super.parse(i2, mapper);
 	}
diff --git a/json-smart/src/test/java/net/minidev/json/test/TestUtf8.java b/json-smart/src/test/java/net/minidev/json/test/TestUtf8.java
index 9058cbd..234314d 100644
--- a/json-smart/src/test/java/net/minidev/json/test/TestUtf8.java
+++ b/json-smart/src/test/java/net/minidev/json/test/TestUtf8.java
@@ -2,6 +2,7 @@
 
 import java.io.ByteArrayInputStream;
 import java.io.StringReader;
+import java.nio.charset.StandardCharsets;
 import java.util.stream.Stream;
 
 import net.minidev.json.JSONObject;
@@ -47,7 +48,7 @@ public void supportI18nStringReader(String language, String nonLatinText) throws
 	@MethodSource("languages")
 	public void supportI18nByteArrayInputStream(String language, String nonLatinText) throws Exception {
 		String json = "{\"key\":\"" + nonLatinText + "\"}";
-		ByteArrayInputStream bis = new ByteArrayInputStream(json.getBytes("utf8"));
+		ByteArrayInputStream bis = new ByteArrayInputStream(json.getBytes(StandardCharsets.UTF_8));
 		JSONObject obj = (JSONObject) JSONValue.parse(bis);
 		String actual = (String) obj.get("key");
 		assertEquals(nonLatinText, actual, "Parsing ByteArrayInputStream " + language + " text");
@@ -57,7 +58,7 @@ public void supportI18nByteArrayInputStream(String language, String nonLatinText
 	@MethodSource("languages")
 	public void supportI18nBytes(String language, String nonLatinText) throws Exception {
 		String json = "{\"key\":\"" + nonLatinText + "\"}";
-		byte[] bs = json.getBytes("utf8");
+		byte[] bs = json.getBytes(StandardCharsets.UTF_8);
 		JSONObject obj = JSONValue.parse(bs, JSONObject.class);
 		String actual = (String) obj.get("key");
 		assertEquals(nonLatinText, actual, "Parsing bytes[] " + language + " text");