diff --git a/imooc-security-core/src/main/java/com/imooc/security/core/validate/code/image/ImageCodeProcessor.java b/imooc-security-core/src/main/java/com/imooc/security/core/validate/code/image/ImageCodeProcessor.java
index 75165f6..597fa69 100644
--- a/imooc-security-core/src/main/java/com/imooc/security/core/validate/code/image/ImageCodeProcessor.java
+++ b/imooc-security-core/src/main/java/com/imooc/security/core/validate/code/image/ImageCodeProcessor.java
@@ -24,6 +24,7 @@ public class ImageCodeProcessor extends AbstractValidateCodeProcessor<ImageCode>
 	 */
 	@Override
 	protected void send(ServletWebRequest request, ImageCode imageCode) throws Exception {
+		request.getResponse().setContentType("image/jpeg");
 		ImageIO.write(imageCode.getImage(), "JPEG", request.getResponse().getOutputStream());
 	}