diff --git a/docs/CONFIGURATION.md b/docs/CONFIGURATION.md
index 9730f8d4..05f96c9a 100644
--- a/docs/CONFIGURATION.md
+++ b/docs/CONFIGURATION.md
@@ -21,37 +21,44 @@ you will be overriding the values set in the configuration files.
 
 | Name                                 | Value                                                         |
 | ------------------------------------ | ------------------------------------------------------------- |
-| `MCAPTCHA_DATEBASE_PASSWORD`            | Postgres password                                             |
-| `MCAPTCHA_DATEBASE_NAME`                | Postgres database name                                        |
-| `MCAPTCHA_DATEBASE_PORT`                | Postgres port                                                 |
-| `MCAPTCHA_DATEBASE_HOSTNAME`            | Postgres hostmane                                             |
-| `MCAPTCHA_DATEBASE_USERNAME`            | Postgres username                                             |
-| `MCAPTCHA_DATEBASE_POOL`                | Postgres database connection pool size                        |
+| `MCAPTCHA_DATEBASE_PASSWORD`         | Postgres password                                             |
+| `MCAPTCHA_DATEBASE_NAME`             | Postgres database name                                        |
+| `MCAPTCHA_DATEBASE_PORT`             | Postgres port                                                 |
+| `MCAPTCHA_DATEBASE_HOSTNAME`         | Postgres hostmane                                             |
+| `MCAPTCHA_DATEBASE_USERNAME`         | Postgres username                                             |
+| `MCAPTCHA_DATEBASE_POOL`             | Postgres database connection pool size                        |
 | `DATABSE_URL` (overrides above vars) | databse URL in `postgres://user:pass@host:port/dbname` format |
 
+#### Redis:
+
+| Name                  | Value                      |
+| --------------------- | -------------------------- |
+| `MCAPTCHA_REDIS_URL`  | Redis URL                  |
+| `MCAPTCHA_REDIS_POOL` | Redis connection pool size |
+
 #### Server:
 
-| Name                                  | Value                                               |
-| ------------------------------------- | --------------------------------------------------- |
+| Name                                     | Value                                                  |
+| ---------------------------------------- | ------------------------------------------------------ |
 | `MCAPTCHA_SERVER_PORT`                   | The port on which you want mcaptcha to listen to       |
 | `PORT`(overrides `MCAPTCHA_SERVER_PORT`) | The port on which you want mcaptcha to listen to       |
 | `MCAPTCHA_SERVER_IP`                     | The IP address on which you want mcaptcha to listen to |
 | `MCAPTCHA_SERVER_DOMAIN`                 | Domain under which mcaptcha will be\*                  |
-| `MCAPTCHA_SERVER_COOKIE_SECRET`          | Cookie secret, must be long and random              |
-| `MCAPTCHA_SERVER_ALLOW_REGISTRATION`     | `bool` that controls                                |  | registration |
+| `MCAPTCHA_SERVER_COOKIE_SECRET`          | Cookie secret, must be long and random                 |
+| `MCAPTCHA_SERVER_ALLOW_REGISTRATION`     | `bool` that controls                                   |  | registration |
 
 \* Authentication doesn't work without `MCAPTCHA_DOMAIN` set to the correct
 domain
 
 ### Configuration file location:
 
-| Name           | Value               |
-| -------------- | ------------------- |
+| Name              | Value               |
+| ----------------- | ------------------- |
 | `MCAPTCHA_CONFIG` | Path to config file |
 
 ### Proof of work:
 
-| Name             | Value                                                                                   |
-| ---------------- | --------------------------------------------------------------------------------------- |
+| Name                | Value                                                                                   |
+| ------------------- | --------------------------------------------------------------------------------------- |
 | `MCAPTCHA_POW_SALT` | Salt has to be long and random                                                          |
 | `MCAPTCHA_POW_GC`   | Garbage collection duration in seconds, requires tuning but 30 is a good starting point |
diff --git a/docs/DEPLOYMENT.md b/docs/DEPLOYMENT.md
index 992413c4..754c8154 100644
--- a/docs/DEPLOYMENT.md
+++ b/docs/DEPLOYMENT.md
@@ -1,6 +1,6 @@
 # Deployment instructions:
 
-See [CONFIGURATION.md](./CONFIGURATION.md) for configuration instructions 
+See [CONFIGURATION.md](./CONFIGURATION.md) for configuration instructions
 
 There are three ways to deploy mCaptcha:
 
@@ -71,6 +71,11 @@ postgres=#  CREATE USER mcaptcha WITH PASSWORD 'my super long password and yes y
 $  createdb -O mcaptcha mcaptcha # create db 'mcaptcha' with 'mcaptcha' as owner
 ```
 
+### 4. Install and load [`mCaptcha/cache`](https://github.com/mCaptcha/cache) module:
+
+See [`mCaptcha/cache`](https://github.com/mCaptcha/cache) for more
+details.
+
 ### 4. Build `mcaptcha`:
 
 To build `mcaptcha`, you need the following dependencies:
@@ -140,8 +145,10 @@ WantedBy=multi-user.target
 ```
 
 2. Enable service:
+
 ```bash
 $ sudo systemctl daemon-reload && \
 	sudo systemctl enable mcaptcha && \ # Auto startup during boot
 	sudo systemctl start mcaptcha
 ``
+```
diff --git a/src/docs.rs b/src/docs.rs
index 3df5e5c9..dfce3059 100644
--- a/src/docs.rs
+++ b/src/docs.rs
@@ -83,7 +83,6 @@ async fn spec() -> HttpResponse {
 }
 
 async fn index() -> HttpResponse {
-    println!("getting index");
     handle_embedded_file("index.html")
 }