diff --git a/src/main/java/com/alibaba/druid/support/http/ResourceServlet.java b/src/main/java/com/alibaba/druid/support/http/ResourceServlet.java
index b8551dbfb2..cbe2cde756 100644
--- a/src/main/java/com/alibaba/druid/support/http/ResourceServlet.java
+++ b/src/main/java/com/alibaba/druid/support/http/ResourceServlet.java
@@ -155,6 +155,10 @@ public abstract class ResourceServlet extends HttpServlet {
                                                                                                 IOException {
 
         String filePath = getFilePath(fileName);
+        
+        if (filePath.endsWith(".html")) {
+            response.setContentType("text/html; charset=utf-8");
+        }
         if (fileName.endsWith(".jpg")) {
             byte[] bytes = Utils.readByteArrayFromResource(filePath);
             if (bytes != null) {