diff --git a/Dockerfile b/Dockerfile
index 4e73d36..89c7ffa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM squidfunk/mkdocs-material:6.1.6 as material
+FROM squidfunk/mkdocs-material:9.0.6 as material
 
 FROM ubuntu:bionic-20200921