diff --git a/app/controllers/api/projects.php b/app/controllers/api/projects.php
index 4f8f148a7..64d34eb68 100644
--- a/app/controllers/api/projects.php
+++ b/app/controllers/api/projects.php
@@ -40,7 +40,7 @@ App::post('/v1/projects')
     ->label('sdk.response.code', Response::STATUS_CODE_CREATED)
     ->label('sdk.response.type', Response::CONTENT_TYPE_JSON)
     ->label('sdk.response.model', Response::MODEL_PROJECT)
-    ->param('projectId', '', new CustomId(), 'Unique Id. Choose your own unique ID or pass the string `unique()` to auto generate it. Valid chars are a-z, A-Z, 0-9, and underscore. Can\'t start with a leading underscore. Max length is 36 chars.')
+    ->param('projectId', '', new CustomId(), 'Unique Id. Choose your own unique ID or pass the string `unique()` to auto generate it. Valid chars are a-z, A-Z, 0-9, and non leading underscore, hyphen and dot. Max length is 36 chars.')
     ->param('name', null, new Text(128), 'Project name. Max length: 128 chars.')
     ->param('teamId', '', new UID(), 'Team unique ID.')
     ->param('description', '', new Text(256), 'Project description. Max length: 256 chars.', true)