diff --git a/docs/source/conf.py b/docs/source/conf.py
index f71341e..1b1467d 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -79,9 +79,9 @@
     "use_edit_page_button": True,  # add button to suggest edits
     "home_page_in_toc": True,
     "launch_buttons": {
-        "binderhub_url": "https://mybinder.org"
-        "colab_url": "https://colab.research.google.com"
-	     thebe: true
+        "binderhub_url": "https://mybinder.org",
+        "colab_url": "https://colab.research.google.com",
+	"thebe": true,
     },    
 }