diff --git a/Cargo.lock b/Cargo.lock
index bd7d62f..4489b3b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -167,7 +167,7 @@ checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
 [[package]]
 name = "chronicle-dicebot"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "async-trait",
  "dirs",
diff --git a/Cargo.toml b/Cargo.toml
index 706c1e4..ebca778 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "chronicle-dicebot"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Taylor C. Richberger <taywee@gmx.com>", "projectmoon <projectmoon@agnos.is>"]
 edition = "2018"
 license = 'MIT'
diff --git a/README.md b/README.md
index 7fb13bb..c655333 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,9 @@ This is a fork of the
 [axfive-matrix-dicebot](https://gitlab.com/Taywee/axfive-matrix-dicebot)
 with basic support for the Chronicles of Darkness 2E Storytelling
 System, with future plans to extend the codebase further to support
-variables and perhaps character sheet management.
+variables and perhaps character sheet management. It also contains
+various fixes, uses the Matrix SDK for connectivity, and has a Docker
+image.
 
 ## Usage
 
@@ -48,12 +50,9 @@ like this:
 
 ```ini
 [matrix]
-home_server = 'matrix.org'
-
-[matrix.login]
+home_server = https://'matrix.org'
+username = 'thisismyusername'
 password = 'thisismypassword'
-type = 'm.login.password'
-user = 'axfive-dicebot'
 ```
 
 Of course replacing all the necessary fields. Then you can run the
@@ -64,6 +63,28 @@ You can also just run it on the command line with the `dicebot-cmd`
 command, which expects you to feed it one of the command expressions
 as shown above, and will give you the plaintext response.
 
+## Docker Image
+
+The dice bot can run in a minimal Docker image based on [Void
+Linux](https://voidlinux.org/). To create the Docker image, run
+`docker build -t chronicle-dicebot .` in the root of the repository.
+
+A typical docker run command should look something like this:
+```
+VERSION="0.3.0"
+docker run --rm -d --name dicebot \
+-v /path/to/dicebot-config.toml:/config/dicebot-config.toml:ro \
+-v /path/to/cache//:/cache \
+chronicle-dicebot:$VERSION
+```
+
+The Docker image requires two volume mounts: the location of the
+config file, which should be mounted at `/config/dicebot-config.toml`,
+and a cache directory to store client state after initial sync. That
+should be mounted at `/cache/`in the container.
+
+Properly automated docker builds are forthcoming.
+
 ## Future plans
 
 The most basic plans are:
@@ -72,4 +93,5 @@ The most basic plans are:
   a name to a value (`gnosis = 3`) and then using those in dice rolls.
 * Perhaps some sort of character sheet integration. But for that, we
   would need a sheet service.
-* Robustness fixes if necessary, which will be sent upstream.
+* Automation of Docker builds.
+* Use environment variables instead of config file in Docker image.