diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39b91d833..6a986f88c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Restructured the _FIRE_ section
 - Upgraded `@simplewebauthn/browser` and `@simplewebauthn/server` from version `4.1.0` to `5.2.1`
 
+### Fixed
+
+- Fixed the `docker-compose` files to resolve variables correctly
+
 ## 1.155.0 - 29.05.2022
 
 ### Added
diff --git a/README.md b/README.md
index f29693e7e..545d9d6b3 100644
--- a/README.md
+++ b/README.md
@@ -91,7 +91,7 @@ The frontend is built with [Angular](https://angular.io) and uses [Angular Mater
 Run the following command to start the Docker images from [Docker Hub](https://hub.docker.com/r/ghostfolio/ghostfolio):
 
 ```bash
-docker-compose -f docker/docker-compose.yml up -d
+docker-compose --env-file ./.env -f docker/docker-compose.yml up -d
 ```
 
 #### Setup Database
@@ -99,7 +99,7 @@ docker-compose -f docker/docker-compose.yml up -d
 Run the following command to setup the database once Ghostfolio is running:
 
 ```bash
-docker-compose -f docker/docker-compose.yml exec ghostfolio yarn database:setup
+docker-compose --env-file ./.env -f docker/docker-compose.yml exec ghostfolio yarn database:setup
 ```
 
 ### b. Build and run environment
@@ -107,8 +107,8 @@ docker-compose -f docker/docker-compose.yml exec ghostfolio yarn database:setup
 Run the following commands to build and start the Docker images:
 
 ```bash
-docker-compose -f docker/docker-compose.build.yml build
-docker-compose -f docker/docker-compose.build.yml up -d
+docker-compose --env-file ./.env -f docker/docker-compose.build.yml build
+docker-compose --env-file ./.env -f docker/docker-compose.build.yml up -d
 ```
 
 #### Setup Database
@@ -116,7 +116,7 @@ docker-compose -f docker/docker-compose.build.yml up -d
 Run the following command to setup the database once Ghostfolio is running:
 
 ```bash
-docker-compose -f docker/docker-compose.build.yml exec ghostfolio yarn database:setup
+docker-compose --env-file ./.env -f docker/docker-compose.build.yml exec ghostfolio yarn database:setup
 ```
 
 ### Fetch Historical Data
@@ -130,8 +130,8 @@ Open http://localhost:3333 in your browser and accomplish these steps:
 ### Upgrade Version
 
 1. Increase the version of the `ghostfolio/ghostfolio` Docker image in `docker/docker-compose.yml`
-1. Run the following command to start the new Docker image: `docker-compose -f docker/docker-compose.yml up -d`
-1. Then, run the following command to keep your database schema in sync: `docker-compose -f docker/docker-compose.yml exec ghostfolio yarn database:migrate`
+1. Run the following command to start the new Docker image: `docker-compose --env-file ./.env -f docker/docker-compose.yml up -d`
+1. Then, run the following command to keep your database schema in sync: `docker-compose --env-file ./.env -f docker/docker-compose.yml exec ghostfolio yarn database:migrate`
 
 ## Run with _Unraid_ (self-hosting)
 
@@ -149,7 +149,7 @@ Please follow the instructions of the Ghostfolio [Unraid Community App](https://
 ### Setup
 
 1. Run `yarn install`
-1. Run `docker-compose -f docker/docker-compose.dev.yml up -d` to start [PostgreSQL](https://www.postgresql.org) and [Redis](https://redis.io)
+1. Run `docker-compose --env-file ./.env -f docker/docker-compose.dev.yml up -d` to start [PostgreSQL](https://www.postgresql.org) and [Redis](https://redis.io)
 1. Run `yarn database:setup` to initialize the database schema and populate your database with (example) data
 1. Start the server and the client (see [_Development_](#Development))
 1. Create a new user via _Get Started_ (this first user will get the role `ADMIN`)
diff --git a/docker/docker-compose.build.yml b/docker/docker-compose.build.yml
index 37f63d8c8..82fccad8b 100644
--- a/docker/docker-compose.build.yml
+++ b/docker/docker-compose.build.yml
@@ -5,7 +5,7 @@ services:
     env_file:
       - ../.env
     environment:
-      DATABASE_URL: postgresql://user:password@postgres:5432/ghostfolio-db?sslmode=prefer
+      DATABASE_URL: postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}?sslmode=prefer
       REDIS_HOST: 'redis'
       REDIS_PASSWORD: ${REDIS_PASSWORD}
     ports:
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 786f62f55..c94954b3e 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -5,7 +5,7 @@ services:
     env_file:
       - ../.env
     environment:
-      DATABASE_URL: postgresql://user:password@postgres:5432/ghostfolio-db?sslmode=prefer
+      DATABASE_URL: postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}?sslmode=prefer
       REDIS_HOST: 'redis'
       REDIS_PASSWORD: ${REDIS_PASSWORD}
     ports: