diff --git a/manual/upgrade/upgrade_docker.md b/manual/upgrade/upgrade_docker.md
index 5562d2bd..64e4b49a 100644
--- a/manual/upgrade/upgrade_docker.md
+++ b/manual/upgrade/upgrade_docker.md
@@ -70,6 +70,12 @@ Then download the new `seafile-server.yml` according to the following commands:
     wget https://manual.seafile.com/13.0/repo/docker/pro/seasearch.yml
     ```
 
+#### Step 2.4) Download `.yml` file for seadoc
+
+```sh
+wget https://manual.seafile.com/13.0/repo/docker/seadoc.yml
+```
+
 ### Step 3) Modify `.env`, update image version and add cache configurations
 
 #### Step 3.1) Update image version to Seafile 13