diff --git a/.env.sample b/.env.sample
index 032b8fa..40dd2aa 100644
--- a/.env.sample
+++ b/.env.sample
@@ -2,6 +2,7 @@ VERSION=0.1.0
 
 DEVELOPMENT=false
 HOST_NAME=vim.linkedmusic.ca
+PORT=8000
 
 ## DATABASE ##
 POSTGRES_DB=virtual_instrument_museum
diff --git a/README.md b/README.md
index 7ed5e7e..82f59b7 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ NOTE: These instructions are for local development only. Refer to the "Installat
 
 VIM requires Docker Engine with Compose V2. VIM's Docker Compose configuration is written according to the Compose Specification. 
 
-After cloning this repository, set up a local `.env` file. Copy or rename the `.env.sample` file to `.env` and update it to include uncommented environment variables for database credentials `POSTGRES_USER` and `POSTGRES_PASSWORD`. Verify the values of the `DEVELOPMENT` and `HOST_NAME` variables. For local development ONLY, these should be set to "true" and "localhost" respectively.
+After cloning this repository, set up a local `.env` file. Copy or rename the `.env.sample` file to `.env` and update it to include uncommented environment variables for database credentials `POSTGRES_USER` and `POSTGRES_PASSWORD`. Verify the values of the `DEVELOPMENT`, `HOST_NAME`, and `PORT` variables. For local development ONLY, these should be set to "true", "localhost", and "8000" respectively.
 
 ```console
 > docker compose build
@@ -41,7 +41,7 @@ VIM requires Docker Engine with Compose V2. Ensure that the remote server has th
 
 SSH into the server. After cloning the repository, set up a local `.env` file. Copy or rename the `.env.sample` file to `.env` and update it to include uncommented environment variables for database credentials `POSTGRES_USER` and `POSTGRES_PASSWORD`. Ensure that `POSTGRES_PASSWORD` is secure.
 
-Ensure that the `DEVELOPMENT` variable is set to "false", and that `HOST_NAME` is set to the host name where the VIM instance will be served (for example, "vim.linkedmusic.ca" or "vim.staging.linkedmusic.ca"). 
+Ensure that the `DEVELOPMENT` variable is set to "false", and that `HOST_NAME` is set to the host name where the VIM instance will be served (for example, "vim.linkedmusic.ca" or "vim.staging.linkedmusic.ca"). Set the `PORT` variable to "80".
 
 Then, run
 
diff --git a/docker-compose.yml b/docker-compose.yml
index eb0171d..165468e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -44,7 +44,7 @@ services:
     environment:
       - HOST_NAME=${HOST_NAME}
     ports:
-      - "8000:80"
+      - "${PORT}:80"
     volumes:
       - vim-static:/virtual-instrument-museum/static
     depends_on:
diff --git a/web-app/django/VIM/settings.py b/web-app/django/VIM/settings.py
index 93410b0..af76145 100644
--- a/web-app/django/VIM/settings.py
+++ b/web-app/django/VIM/settings.py
@@ -153,7 +153,5 @@
 # DEPLOYMENT SETTINGS
 
 CSRF_COOKIE_SECURE = IS_PRODUCTION
-CSRF_TRUSTED_ORIGINS = [
-    f'http{"s" if IS_PRODUCTION else ""}://{os.environ.get("HOST_NAME")}'
-]
+CSRF_TRUSTED_ORIGINS = [f'https://{os.environ.get("HOST_NAME")}']
 SESSION_COOKIE_SECURE = IS_PRODUCTION