diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index db0052281..c31a0cb30 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -58,7 +58,7 @@ re_github_repo = re.compile(
 )
 
 re_app_instance_name = re.compile(
-    r'^(?P<appid>[\w]+?)(__(?P<appinstancenb>[1-9][0-9]*))?$'
+    r'^(?P<appid>[\w-]+?)(__(?P<appinstancenb>[1-9][0-9]*))?$'
 )