diff --git a/README.md b/README.md
index eb79bad11b73c8207aecf60537936587519cc9a7..4d175e88eab8fb015828d90661f885206a85dcc1 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,8 @@ Go to https://gitlab.com/profile/applications or your GitLab installation and re
 > `KANBAN_GITLAB_CLIENT` | Your GitLab OAuth client application ID, required for OAuth to work. Git this from your gitlab server.
 >
 > `KANBAN_GITLAB_SECRET` | Your GitLab OAuth client secret key, required for OAuth to work. Git this from your gitlab server.
+>
+> `KANBAN_ENABLE_SIGNUP` | Wheter to enable sign up with user API token.
 
 **Then**
 
diff --git a/docs/installation/docker.md b/docs/installation/docker.md
index 3a312445cbf06d44216136c80cf6eae6a41f2f81..78a9d72c484496bcebbfedf85495283c83513330 100644
--- a/docs/installation/docker.md
+++ b/docs/installation/docker.md
@@ -88,7 +88,8 @@ The LeanLabs Kanban image requires Redis, which [we are also providing](https://
         -e KANBAN_GITLAB_CLIENT="Application ID"
         -e KANBAN_GITLAB_SECRET="Secret"
         -e KANBAN_REDIS_ADDR="kanban_redis:6379"
-        leanlabs/kanban:1.4.0
+        -e KANBAN_ENABLE_SIGNUP="true"
+        leanlabs/kanban:1.6.2
     ```
     Now you should be able to access kanban via GitLab OAuth.
 
@@ -129,6 +130,8 @@ If you use a self hosted GitLab installation the value must also include the pro
 You may also use a unix socket, if you set address as "unix:///path/to/sock.sock".
 LeanLabs Kanban requires the Redis server to function properly, it stores users identities there.
 
+- **KANBAN_ENABLE_SIGNUP** - default to "true". Wheter to enable sign up with user API token.
+
 - **KANBAN_REDIS_PASSWORD** - default to "" (empty string). The Redis server password if any.
 
 - **KANBAN_REDIS_DB** - default to "0", redis server database numeric index, from 0 to 16, also rarely required to be changed if ever.