diff --git a/octomode.py b/octomode.py
index 70409cd..14f5fd3 100755
--- a/octomode.py
+++ b/octomode.py
@@ -128,12 +128,26 @@ def stylesheet(name):
 
 @APP.route('/<name>/html/')
 def html(name):
-    url = f"/{ name }/preview.html"
+    # only here we need application root to make all the URLs work.....
+    if APP.config['APPLICATION_ROOT'] == '/':
+        app_root = ''
+    elif APP.config['APPLICATION_ROOT'].endswith('/'):
+        app_root = APP.config['APPLICATION_ROOT'][:-1]
+    else:
+        app_root = APP.config['APPLICATION_ROOT']
+    url = f"{ app_root }/{ name }/preview.html"
     return render_template('iframe.html', url=url, name=name.strip(), pad_url=APP.config['PAD_URL'])
 
 @APP.route('/<name>/pdf/')
 def pdf(name):
-    url = f"/{name}/pagedjs.html"
+    # only here we need application root to make all the URLs work.....
+    if APP.config['APPLICATION_ROOT'] == '/':
+        app_root = ''
+    elif APP.config['APPLICATION_ROOT'].endswith('/'):
+        app_root = APP.config['APPLICATION_ROOT'][:-1]
+    else:
+        app_root = APP.config['APPLICATION_ROOT']
+    url = f"{ app_root }/{name}/pagedjs.html"
     return render_template('pdf.html', url=url, name=name.strip(), pad_url=APP.config['PAD_URL'])
 
 # //////////////////
diff --git a/settings.py b/settings.py
index 9ba0f6c..96b6c1d 100644
--- a/settings.py
+++ b/settings.py
@@ -5,6 +5,7 @@ from dotenv import load_dotenv
 load_dotenv()
 
 # Bind them to Python variables
+APPLICATION_ROOT = os.environ.get('OCTOMODE_APPLICATION_ROOT', '/')
 PORTNUMBER = int(os.environ.get('OCTOMODE_PORTNUMBER', 5001))
 PAD_URL = os.environ.get('OCTOMODE_PAD_URL', 'https://pad.vvvvvvaria.org')
 PAD_API_URL = os.environ.get('OCTOMODE_PAD_API_URL', 'https://pad.vvvvvvaria.org/api/1.2.15')