diff --git a/src/main/java/com/whatsapp/api/domain/messages/DocumentParameter.java b/src/main/java/com/whatsapp/api/domain/messages/DocumentParameter.java
index b0f3f31..ed2b143 100644
--- a/src/main/java/com/whatsapp/api/domain/messages/DocumentParameter.java
+++ b/src/main/java/com/whatsapp/api/domain/messages/DocumentParameter.java
@@ -10,37 +10,25 @@
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class DocumentParameter extends Parameter {
 
-    @JsonProperty("link")
-    private String link;
-    @JsonProperty("caption")
-    private String caption;
-    @JsonProperty("filename")
-    private String filename;
+    @JsonProperty("document")
+    private Media document;
 
 
     /**
      * Instantiates a new Document parameter.
      *
-     * @param link the link
-     * @param caption the caption
-     * @param filename the filename
+     * @param document document
      */
-    public DocumentParameter(String link, String caption, String filename) {
-        super(ParameterType.IMAGE);
-        this.link = link;
-        this.caption = caption;
-        this.filename = filename;
+    public DocumentParameter(Media document) {
+        super(ParameterType.DOCUMENT);
+        this.document = document;
     }
 
-    public String getLink() {
-        return link;
+    public Media getDocument() {
+        return document;
     }
 
-    public String getCaption() {
-        return caption;
-    }
-
-    public String getFilename() {
-        return filename;
+    public void setDocument(Media document) {
+        this.document = document;
     }
 }
diff --git a/src/main/java/com/whatsapp/api/domain/messages/ImageParameter.java b/src/main/java/com/whatsapp/api/domain/messages/ImageParameter.java
index 0a6e848..488fea5 100644
--- a/src/main/java/com/whatsapp/api/domain/messages/ImageParameter.java
+++ b/src/main/java/com/whatsapp/api/domain/messages/ImageParameter.java
@@ -10,30 +10,24 @@
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class ImageParameter extends Parameter {
 
-    @JsonProperty("link")
-    private String link;
-    @JsonProperty("caption")
-    private String caption;
-
+    @JsonProperty("image")
+    private Media image;
 
     /**
      * Instantiates a new Image parameter.
      *
-     * @param link the link
-     * @param caption the caption
+     * @param image image
      */
-    public ImageParameter(String link, String caption) {
+    public ImageParameter(Media image) {
         super(ParameterType.IMAGE);
-        this.link = link;
-        this.caption = caption;
+        this.image = image;
     }
 
-    public String getLink() {
-        return link;
+    public Media getImage() {
+        return image;
     }
 
-    public String getCaption() {
-        return caption;
+    public void setImage(Media image) {
+        this.image = image;
     }
-
 }
diff --git a/src/main/java/com/whatsapp/api/domain/messages/Media.java b/src/main/java/com/whatsapp/api/domain/messages/Media.java
new file mode 100644
index 0000000..a9e5378
--- /dev/null
+++ b/src/main/java/com/whatsapp/api/domain/messages/Media.java
@@ -0,0 +1,45 @@
+package com.whatsapp.api.domain.messages;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.*;
+
+import static com.fasterxml.jackson.annotation.JsonInclude.Include.NON_NULL;
+
+@NoArgsConstructor
+@AllArgsConstructor
+@Getter
+@Setter
+@Builder
+@JsonInclude(NON_NULL)
+public class Media {
+    /**
+     * Required when type is an image, audio, document, or video and you are not using a link.
+     * The media object ID. For more information, see Get Media ID.
+     * */
+    private String id;
+    /**
+     * Required when type is audio, document, image, sticker, or video and you are not using an uploaded media ID.
+     * The protocol and URL of the media to be sent. Use only with HTTP/HTTPS URLs. caption	Optional.
+     */
+    private String link;
+
+    /**
+     * Describes the specified image, video, or document media. Do not use it with audio media.
+     */
+    private String caption;
+
+    /**
+     *  Describes the filename for the specific document. Use only with document media.
+     */
+    private String filename;
+
+    /**
+     * 是否是语音
+     */
+    private Boolean voice;
+
+    /**
+     * 文件类型
+     */
+    private String mimeType;
+}
diff --git a/src/main/java/com/whatsapp/api/domain/messages/VideoParameter.java b/src/main/java/com/whatsapp/api/domain/messages/VideoParameter.java
index 9d115cf..53597d0 100644
--- a/src/main/java/com/whatsapp/api/domain/messages/VideoParameter.java
+++ b/src/main/java/com/whatsapp/api/domain/messages/VideoParameter.java
@@ -10,30 +10,24 @@
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class VideoParameter extends Parameter {
 
-    @JsonProperty("link")
-    private String link;
-    @JsonProperty("caption")
-    private String caption;
-
+    @JsonProperty("video")
+    private Media video;
 
     /**
      * Instantiates a new Video parameter.
      *
-     * @param link the link
-     * @param caption the caption
+     * @param video video
      */
-    public VideoParameter(String link, String caption) {
-        super(ParameterType.IMAGE);
-        this.link = link;
-        this.caption = caption;
+    public VideoParameter(Media video) {
+        super(ParameterType.VIDEO);
+        this.video = video;
     }
 
-    public String getLink() {
-        return link;
+    public Media getVideo() {
+        return video;
     }
 
-    public String getCaption() {
-        return caption;
+    public void setVideo(Media video) {
+        this.video = video;
     }
-
 }