diff --git a/Environment-Variables.md b/Environment-Variables.md
index a3c79d3..a0f349c 100644
--- a/Environment-Variables.md
+++ b/Environment-Variables.md
@@ -8,6 +8,7 @@
 | `UPTIME_KUMA_SSL_KEY` or `SSL_KEY`         | `ssl-key`                  | Path to SSL key                                                       |            |
 | `UPTIME_KUMA_SSL_CERT` or `SSL_CERT`       | `ssl-cert`                 | Path to SSL certificate                                               |            |
 | `UPTIME_KUMA_CLOUDFLARED_TOKEN`        | `cloudflared-token`                 | Cloudflare Tunnel Token (Available in 1.14.0)                                              |            |
+| `NODE_EXTRA_CA_CERTS`        |                  | Add your self-signed ca certs. (e.g. /cert/path/CAcert.pem) [Read more](https://github.com/louislam/uptime-kuma/issues/1380)                                            |            |
 
 
 ## Docker specific environment variables