diff --git a/.drone.yml b/.drone.yml
index a5d7f4c..1c27c0f 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -6,8 +6,8 @@ steps:
 - name: html_validate
   image: ubuntu
   commands:
-  - apt update && apt upgrade -y && apt install -y w3c-markup-validator
-
+  - apt-get update && apt-get install -y tidy
+  - tidy -imu index.html
 trigger:
   branch:
   - master