diff --git a/README.md b/README.md
index b68a7de..4e87cf0 100644
--- a/README.md
+++ b/README.md
@@ -192,3 +192,4 @@ The service is configured by Environment Variable:
 | WSGI_TIMEOUT | `5` | WSGI timeout. |
 | GUNICORN_TMPFS_DIR | `None` |The working directory for the gunicorn workers. |
 | WSGI_WORKERS | `2` | The number of workers per CPU. | 
+| UNLISTED_ICON_SETS | `'babs'`| Comma separated list of icon set to un-list. Those sets won't be listed in the /sets endpoint.  |
diff --git a/app/settings.py b/app/settings.py
index 00c460b..41a3d2a 100644
--- a/app/settings.py
+++ b/app/settings.py
@@ -15,9 +15,7 @@
 )
 
 COLORABLE_ICON_SETS = ['default']
-LEGACY_ICON_SETS = []
-UNRELEASED_ICON_SETS = ['babs-de', 'babs-fr', 'babs-it']
-UNLISTED_ICON_SETS = LEGACY_ICON_SETS + UNRELEASED_ICON_SETS
+UNLISTED_ICON_SETS = os.environ.get('UNLISTED_ICON_SETS', 'babs').split(',')
 ICON_SET_LANGUAGE = {'babs-de': 'de', 'babs-fr': 'fr', 'babs-it': 'it'}
 DEFAULT_COLOR = {"r": '255', "g": '0', "b": '0'}
 DEFAULT_ICON_SIZE = 48