diff --git a/docs/install.md b/docs/install.md
index 52ae625..91dd531 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -36,6 +36,7 @@ services:
     volumes:
       - home:/var/lib/tenderduty
       - ./config.yml:/var/lib/tenderduty/config.yml
+      - ./chains.d:/var/lib/tenderduty/chains.d/
     logging:
       driver: "json-file"
       options:
@@ -159,4 +160,4 @@ sudo systemctl start tenderduty
 # and to watch the logs, press CTRL-C to stop watching
 sudo journalctl -fu tenderduty
 
-```
\ No newline at end of file
+```