diff --git a/docs/configuration.md b/docs/configuration.md
index 1cc150e..ed8b646 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -885,6 +885,7 @@ Properties for each site:
 | title | string | yes | |
 | url | string | yes | |
 | icon | string | no | |
+| allow-insecure | boolean | no | false |
 | same-tab | boolean | no | false |
 
 `title`
@@ -899,6 +900,10 @@ The URL which will be requested and its response will determine the status of th
 
 Optional URL to an image which will be used as the icon for the site. Can be an external URL or internal via [server configured assets](#assets-path).
 
+`allow-insecure`
+
+Whether to ignore invalid/self-signed certificates.
+
 `same-tab`
 
 Whether to open the link in the same or a new tab.