diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
new file mode 100644
index 00000000..b44518ca
--- /dev/null
+++ b/.devcontainer/Dockerfile
@@ -0,0 +1,24 @@
+FROM mcr.microsoft.com/devcontainers/python:1-3.8-bookworm
+
+ENV PYTHONUNBUFFERED 1
+
+# Install additional OS packages.
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends \
+        libffi-dev \
+        libfreetype6-dev \
+        libjpeg-dev \
+        libwebp-dev \
+        libpng-dev \
+        liblcms2-dev \
+        zlib1g-dev \
+        libmemcached-dev \
+        libsasl2-dev \
+        inkscape \
+        xmlsec1
+
+# Install our requirements now, as they rarely change.
+COPY constraints.txt requirements.txt /tmp/pip-tmp/
+RUN pip3 install -U pip \
+    && pip3 --disable-pip-version-check --no-cache-dir install -r /tmp/pip-tmp/requirements.txt -c /tmp/pip-tmp/constraints.txt \
+    && rm -rf /tmp/pip-tmp
\ No newline at end of file
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 00000000..765fda53
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,33 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/docker-existing-dockerfile
+{
+	"name": "Conference Website",
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "app",
+	"workspaceFolder": "/workspace",
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	"features": {
+		// "ghcr.io/devcontainers/features/python:1": {
+		// 	"installTools": true,
+		// 	"version": "3.12"
+		// }
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	"forwardPorts": [8000],
+
+	// Uncomment the next line to run commands after the container is created.
+	"postCreateCommand": ".devcontainer/post-create.sh",
+
+	// Ensure the workspace directory is marked as safe for git operations.
+	"postStartCommand": "git config --global --add safe.directory ${containerWorkspaceFolder}",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// NOTE: Need to use "root" when using rootless docker on linux.
+	"remoteUser": "root",
+	"containerUser": "root"
+}
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
new file mode 100644
index 00000000..ee03c10f
--- /dev/null
+++ b/.devcontainer/docker-compose.yml
@@ -0,0 +1,45 @@
+# Docker Compose setup for developing Symposion/Registrasion/RegiDesk
+
+services:
+  app:
+    build:
+      context: ..
+      dockerfile: .devcontainer/Dockerfile
+
+    environment:
+      DATABASE_URL: postgres://postgres:postgres@db:5432/postgres
+      DJANGO_SECRET_KEY: 5CEA51A5-A613-4AEF-A9FB-D0A57D77C13B
+      STRIPE_PUBLIC_KEY: 5CEA51A5-A613-4AEF-A9FB-D0A57D77C13B
+      STRIPE_SECRET_KEY: 5CEA51A5-A613-4AEF-A9FB-D0A57D77C13B
+      GCS_BUCKET: 5CEA51A5-A613-4AEF-A9FB-D0A57D77C13B
+      GOOGLE_APPLICATION_CREDENTIALS: /dev/null
+      SYMPOSION_DEV_MODE: LAPTOP
+      SYMPOSION_APP_DEBUG: 1
+
+    volumes:
+      - ../:/workspace:cached
+
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
+    network_mode: service:db
+
+    # Use "forwardPorts" in **devcontainer.json** to forward an app port locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+  db:
+    image: postgres:latest
+    restart: unless-stopped
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_DB: postgres
+      POSTGRES_PASSWORD: postgres
+
+    # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+volumes:
+  postgres-data:
\ No newline at end of file
diff --git a/.devcontainer/post-create.sh b/.devcontainer/post-create.sh
new file mode 100755
index 00000000..ecdce07f
--- /dev/null
+++ b/.devcontainer/post-create.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/bash
+
+pip install --user -r requirements.txt -c constraints.txt
+pip install --user -c constraints.txt -e vendor/registrasion
+pip install --user -c constraints.txt -e vendor/registripe
+pip install --user -c constraints.txt -e vendor/regidesk
\ No newline at end of file
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2353264e..266e0f3e 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8-buster as symposion_base
+FROM python:3.8-bookworm as symposion_base
 
 RUN set -ex \
     && apt-get update
@@ -14,8 +14,9 @@ RUN set -ex \
         libmemcached-dev \
         libsasl2-dev \
         inkscape \
+        xmlsec1 \
     ' \
-    && apt-get install -y git xmlsec1 \
+    && apt-get install -y git \
     && apt-get install -y $buildDeps --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
diff --git a/docker/deploy_with_sqlite.sh b/docker/deploy_with_sqlite.sh
index 4505fefd..c5c42cee 100755
--- a/docker/deploy_with_sqlite.sh
+++ b/docker/deploy_with_sqlite.sh
@@ -3,7 +3,7 @@
 /usr/local/bin/python /app/symposion_app/manage.py migrate
 /usr/local/bin/python /app/symposion_app/manage.py loaddata /app/symposion_app/fixtures/{conference,sites,sitetree,flatpages}.json
 /usr/local/bin/python /app/symposion_app/manage.py create_review_permissions
-/usr/local/bin/python /app/symposion_app/manage.py loaddata /app/symposion_app/fixtures/????/*.json
+/usr/local/bin/python /app/symposion_app/manage.py loaddata /app/symposion_app/fixtures/sessions/*.json
 #/usr/local/bin/python /app/symposion_app/manage.py populate_inventory
 
 if [ -e /configs/auth/auth.json ]; then
diff --git a/requirements.txt b/requirements.txt
index 9a1d1c56..80e6abe1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,6 +15,7 @@ django-waffle==2.0.0
 
 # database
 mysqlclient==2.0.1
+psycopg2==2.8.6
 
 # For testing
 django-nose==1.4.7
diff --git a/vendor/regidesk/requirements.txt b/vendor/regidesk/requirements.txt
index 165a9dc3..b4f84da1 100644
--- a/vendor/regidesk/requirements.txt
+++ b/vendor/regidesk/requirements.txt
@@ -1,4 +1,4 @@
-django-countries>=6.1.3
+django-countries==7.3.2
 requests>=2.24.0
 pypng
 pyqrcode
diff --git a/vendor/registripe/requirements.txt b/vendor/registripe/requirements.txt
index b522cc4b..0510f789 100644
--- a/vendor/registripe/requirements.txt
+++ b/vendor/registripe/requirements.txt
@@ -1,4 +1,4 @@
-django-countries>=6.1.3
+django-countries==7.3.2
 pinax-stripe==4.4.0
 requests>=2.24.0
 stripe==2.55.0