diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4d4de43f..f5cf7274 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,5 @@
 image:
-  name: ghcr.io/peaceiris/mkdocs-material:v3.5.3
+  name: ghcr.io/peaceiris/mkdocs-material:v4.0.0
 
 pages:
   script: