diff --git a/docs/source/conf.py b/docs/source/conf.py
index 8429aac6..a9a3e32f 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -19,7 +19,7 @@
 
 # if this is a dev build, the paths need to be adjusted
 dev_web = '/dev' if ('NODE_ENV' in os.environ and os.environ['NODE_ENV'] == 'development') else ''
-dev_nb = '.dev' if ('NODE_ENV' in os.environ and os.environ['NODE_ENV'] == 'development') else ''
+dev_nb = '-dev' if ('NODE_ENV' in os.environ and os.environ['NODE_ENV'] == 'development') else ''
 
 # current datetime to use as the version
 today = f"Last updated: {datetime.utcnow().strftime('%b %d, %Y')}"