diff --git a/.drone.yml b/.drone.yml
index c67d952..59c2672 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -4,7 +4,7 @@ type: docker
 name: build
 steps:
 - name: build
-  image: squidfunk/mkdocs-material:1.4.2
+  image: squidfunk/mkdocs-material:9.1.8
   volumes:
   - name: site
     path: /site