diff --git a/README.md b/README.md
index 0328e0d..78375b3 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # markov-bot
 
-Markov chain discord bot, sends randomly generated sentences once an hour and when mentioned.
+Markov chain discord bot, sends randomly generated sentences at configurable intervals and when mentioned.
 
 ## Setup
 
@@ -12,5 +12,16 @@ Put some text into `corpus.txt`, and then run
     source env/bin/activate
     pip install discord.py
     python markov-prep.py
-    echo <token> > token
+    cp config.json.example config.json
+    vi config.json
     python markov-bot.py
+
+## Configuration
+
+- `mode`: can be `reply`, to reply to occasional messages, or `timed`, to send messages unprompted to random channels at a set interval
+- `reply_invfreq`: in `reply` mode, will reply to one in N messages on average
+- `reply_delay_min`: minimum amount of time to wait before sending a reply
+- `reply_delay_max`: maximum amount of time to wait before sending a reply
+- `timed_interval_min`: in `timed` mode, minimum time between successive messages in the same guild
+- `timed_interval_max`: maximum time between successive messages in the same guild
+- `token`: Discord bot API token