diff --git a/README.md b/README.md
index 936491427f5d848812e17b2da6bb33d8317f0e75..608eadb1e1ba705067da8da56d2fc4c64d3296cf 100644
--- a/README.md
+++ b/README.md
@@ -12,11 +12,11 @@ Use docker image `duniter/gitbot:master`.
 
 The configuration is done entirely by environment variables:
 
-| Environment variable   | description                                                              |
-|------------------------|--------------------------------------------------------------------------|
-| `GITBOT_XMPP_JID`      | Gitbot xmpp account full JID (user@host)                                 |
-| `GITBOT_XMPP_PASSWORD` | Gitbot xmpp account password                                             |
-| `GITBOT_XMPP_MUC`      | Full jib of target xmpp room (room@host)                                 |
-| `GITBOT_IP`            | IP address on which the gitbot server is listening (to receive webwook)  |
-| `GITBOT_PORT`          | port number on which the gitbot server is listening (to receive webwook) |
-| `GITLAB_TOKEN`         | The secret token that gitlab must use for the webhook                    |
+| Environment variable   | Default value | description                                                              |
+|------------------------|---------------|--------------------------------------------------------------------------|
+| `GITBOT_XMPP_JID`      | Mandatory     | Gitbot xmpp account full JID (user@host)                                 |
+| `GITBOT_XMPP_PASSWORD` | Mandatory     | Gitbot xmpp account password                                             |
+| `GITBOT_XMPP_MUC`      | Mandatory     | Full jib of target xmpp room (room@host)                                 |
+| `GITBOT_IP`            | `0.0.0.0`     | IP address on which the gitbot server is listening (to receive webwook)  |
+| `GITBOT_PORT`          | `8080`        | port number on which the gitbot server is listening (to receive webwook) |
+| `GITLAB_TOKEN`         | Mandatory     | The secret token that gitlab must use for the webhook                    |