diff --git a/requirements.txt b/requirements.txt
index e160b2d..0691869 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +1,10 @@
-asgiref==3.3.4
+asgiref==3.5.0
 confusable-homoglyphs==3.2.0
-coverage==5.5
-Django==2.2.25
-docutils==0.14
+coverage==6.3.2
+Django==3.2.12
+docutils==0.18.1
 gunicorn==20.1.0
-pytz==2019.1
-sqlparse==0.2.4
-typing-extensions==3.7.4.3
-Unidecode==1.0.23
+pytz==2021.3
+sqlparse==0.4.2
+typing-extensions==4.1.1
+Unidecode==1.3.3
diff --git a/urls.py b/urls.py
index 6f592ee..1aaa303 100644
--- a/urls.py
+++ b/urls.py
@@ -1,5 +1,5 @@
 from django.conf import settings
-from django.conf.urls import url, include, re_path
+from django.urls import include, re_path
 from django.views.generic.base import RedirectView 
 from django.views.generic.edit import UpdateView
 from django.views.generic.list import ListView
@@ -61,7 +61,7 @@ else:
 
 # see https://docs.djangoproject.com/en/dev/topics/auth/default/
 # The URLs provided by include('django.contrib.auth.urls') are:
-
+# 
 # accounts/login/ [name='login']
 # accounts/logout/ [name='logout']
 # accounts/password_change/ [name='password_change']
@@ -71,8 +71,6 @@ else:
 # accounts/reset/<uidb64>/<token>/ [name='password_reset_confirm']
 # accounts/reset/done/ [name='password_reset_complete']
 
-# these worked in Django 2.2.24 but failed in .25 even though we include django.contrib.auth
-
 trogglepatterns = [
     path('expofiles/', include(expofilesurls)), # intercepted by Apache, if it is running.
     path('expofiles',  include(expofilesurls)), # curious interaction with the include() here, not just a slash problem.
diff --git a/venv-trog.sh b/venv-trog.sh
index 0c88ba9..73ecc42 100644
--- a/venv-trog.sh
+++ b/venv-trog.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
 # Run this in a terminal in the troggle directory: 'bash venv-trog.sh'
+echo 'Run this in a terminal in the troggle directory: "bash venv-trog.sh"'
 
 # Expects an Ubuntu 20.04 relatively clean install.
 # Running using SQLite 3.31.1 2020-01-27 19:55:54
@@ -10,11 +11,18 @@
 # sudo apt install python3-pip
 # sudo apt install python3.9
 
+# On a clean debian 11 (bullseye) installation with Xfce & ssh, 
+# as debian does not install everything that ubuntu does, you need:
+# sudo usermod -a -G sudo expo # to put expo in sudoers group, re-login required
+# sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.9 1
+# sudo apt install python3-pip
+# sudo apt piinstall python3-venv
+
 # copy this file and requirements.txt into the directory above where you want to install the VENV
-VENAME=p39 # python3.9 and django 2.22.25
+VENAME=d4 # python3.9 and django 4
 
 if [ -d requirements.txt ]; then
-  echo "No requirements.txt found. Copy it here from your most recent installation."
+  echo "No requirements.txt found. Copy it from your most recent installation."
   exit 1
 fi
 
@@ -31,7 +39,11 @@ fi
 echo "### Activating $VENAME"
 cd $VENAME
 source bin/activate
-PIP=bin/pip 
+  # update local version of pip, more recent than OS version
+  # debian bullseye installs pip 20.3.4 which barfs, we want >22.0.3
+python -m pip install --upgrade pip
+
+PIP=pip
 
 $PIP list > original-pip.list
 $PIP freeze >original.txt