diff --git a/extraFiles/my_spawner.py b/extraFiles/my_spawner.py
index c68e007f1a5898654c049feae393274cb0590cc7..b1724e8b7bb787642831bd1c7dec227deb771e79 100644
--- a/extraFiles/my_spawner.py
+++ b/extraFiles/my_spawner.py
@@ -80,9 +80,9 @@ class MySpawner(KubeSpawner):
                    'postStart': {
                       'exec': {
                         'command': {
-                           'sh'
-                           '-c'
-                           '/home/jovyan/shared/.software/prog-desktop.sh || true'              
+                           'sh',
+                           '-c',
+                           '/home/jovyan/shared/.software/prog-desktop.sh || true',           
                         },
                       },
                    },