diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2370a837..fe5be9e2a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@
 * 【http   】     HttpRequest.form方法判断集合增强（pr#381@Gitee）
 * 【core   】     NumberUtil增加calculate方法
 * 【core   】     优化TextSimilarity.longestCommonSubstring性能（issue#I42A6V@Gitee）
+* 【core   】     MultipartRequestInputStream改为使用long以支持大文件（issue#I428AN@Gitee）
 
 ### 🐞Bug修复
 * 【core   】     修复RobotUtil双击右键问题（pr#1721@Github）
diff --git a/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java b/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java
index 03ae1bca2..008a6197c 100644
--- a/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java
+++ b/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java
@@ -41,7 +41,7 @@ public class MultipartRequestInputStream extends BufferedInputStream {
 	 * @param i 跳过的byte数
 	 * @throws IOException IO异常
 	 */
-	public void skipBytes(int i) throws IOException {
+	public void skipBytes(long i) throws IOException {
 		long len = super.skip(i);
 		if (len != i) {
 			throw new IOException("Unable to skip data in HTTP request");
@@ -165,8 +165,8 @@ public class MultipartRequestInputStream extends BufferedInputStream {
 	 * @return 复制的字节数
 	 * @throws IOException 读取异常
 	 */
-	public int copy(OutputStream out) throws IOException {
-		int count = 0;
+	public long copy(OutputStream out) throws IOException {
+		long count = 0;
 		while (true) {
 			byte b = readByte();
 			if (isBoundary(b)) {
@@ -186,8 +186,8 @@ public class MultipartRequestInputStream extends BufferedInputStream {
 	 * @return 复制的字节数
 	 * @throws IOException 读取异常
 	 */
-	public int copy(OutputStream out, long limit) throws IOException {
-		int count = 0;
+	public long copy(OutputStream out, long limit) throws IOException {
+		long count = 0;
 		while (true) {
 			byte b = readByte();
 			if (isBoundary(b)) {
@@ -208,8 +208,8 @@ public class MultipartRequestInputStream extends BufferedInputStream {
 	 * @return 跳过的字节数
 	 * @throws IOException 读取异常
 	 */
-	public int skipToBoundary() throws IOException {
-		int count = 0;
+	public long skipToBoundary() throws IOException {
+		long count = 0;
 		while (true) {
 			byte b = readByte();
 			count++;