diff --git a/README.md b/README.md
index 334f132..28ed415 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,15 @@ Star ratings—e.g. ★★★☆☆—are an indicator of the quality of an aggr
 
 With regards the quality, I am most uncertain about Smarkets, Hypermind, Ladbrokes and WilliamHill, as I haven't used them as much. Also note that, whatever other redeeming features they might have, prediction markets rarely go above 95% or below 5%.
 
+## Tech stack
+
+Overall, the services which we use are:
+
+- Algolia for search
+- Netlify for website deployment
+- DigitalOcean for background jobs, e.g. fetching new forecasts
+- Postgres on DigitalOcean and Mongo for databases
+
 ## Various notes
 
 - Commits follow [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/#summary)
diff --git a/docs/configuration.md b/docs/configuration.md
index 913bc17..38a4bfc 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -40,14 +40,3 @@ Note that not all of these cookies are needed to use all parts of the source cod
 - `REBUIDNETLIFYHOOKURL`
 - `BACKUP_PROXY_IP`
 - `BACKUP_PROXY_PORT`
-
-# Old doc
-
-- Others interface with services, e.g., to access the MongoDB database I'm using to save data and history, or to renew the algolia database. You can get these keys by creating an account with those services.
-
-Overall, the services which we use are:
-
-- Algolia for search
-- Netlify for frontend deployment
-- Heroku and DigitalOcean for backend deployment
-- Postgres and Mongo for databases