diff --git a/README.md b/README.md
index 1936997..5ef1655 100644
--- a/README.md
+++ b/README.md
@@ -1,48 +1,14 @@
 # KOreader Sync Server
-This is a KOreader sync server, implemented in Rust. It uses the crates *axum*, *sqlx*, *serde* and *serde_json*.
+This is a KOreader sync server, implemented in Rust. It uses the crates *axum*, *redis*, *serde* and *serde_json*.
 
 ## Requirements
-- Rust toolchain for compilation
-- A running PostgreSQL server
+- Rust toolchain (≥ 1.63) for compilation
+- A running Redis server
 - Nginx (or Apache) webserver as a reverse proxy, since kosyncrs only listens locally and uses HTTP.
 
 ## Installation
-Just compile it with `cargo build --release`. You can then copy the executable for example to `/usr/local/bin/`.
+Just compile it with `cargo build --release`. You can then copy the executable for example to `/usr/local/bin/`. If you want to start the service automatically, you can adapt the example systemd file for your needs. You can also use nginx as a reverse proxy, so that the sync server listens on port 443.
 
-If you want to start the service automatically, you can adapt the example systemd file for your needs. Please pay particularly attention to the PG_URL environment variable.You have to adjust the database username and password.
-
-You can also use nginx as a reverse proxy, so that the sync server listens on port 443. An example file is provided.
-
-### Database setup
-First, create a new database user and set a password:
-```
-$ createuser -P kosync
-```
-
-Then, create a new database which is owned by the newly created user:
-```
-$ createdb -O kosync kosync
-```
-
-Connect to the database (with psql) and create the database tables:
-```sql
-CREATE TABLE users (
-  id BIGSERIAL PRIMARY KEY,
-  username TEXT NOT NULL,
-  password TEXT
-);
-
-CREATE TABLE progresses (
-  id BIGSERIAL PRIMARY KEY,
-  user_id BIGINT,
-  document TEXT UNIQUE NOT NULL,
-  progress TEXT NOT NULL,
-  percentage REAL NOT NULL,
-  device TEXT NOT NULL,
-  device_id TEXT NOT NULL,
-  timestamp BIGINT NOT NULL,
-  FOREIGN KEY (user_id)
-     REFERENCES users(id) ON DELETE CASCADE,
-  UNIQUE (user_id, document)
-);
-```
\ No newline at end of file
+## Todo
+- Test, if it really works, and if it works reliably. Feedback is very welcome!
+- Make it more configurable
\ No newline at end of file
diff --git a/systemd/kosyncrs.service b/systemd/kosyncrs.service
index b405332..ceeaf52 100644
--- a/systemd/kosyncrs.service
+++ b/systemd/kosyncrs.service
@@ -11,7 +11,6 @@ User=myuser
 Group=users
 WorkingDirectory=/home/myuser
 ExecStart=/usr/local/bin/kosyncrs
-Environment="PG_URL=postgresql://kosync:password@localhost/kosync"
 Restart=always
 
 [Install]