diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c31ad7..4807ae4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [Unreleased]
+
+- Update README
+- Update airports & timezone csv by running `mix airports.update`
+- Auto download source file when running `mix airports.update`
+- Bump dependencies: `excoveralls`, `castore`, `ex_doc`, and `dialyxir`
+
 ## 1.0.0
 
 - **Breaking change:** Swapped to new airports datasource as old has not been [updated since 2019](https://github.com/jpatokal/openflights/commits/master/data/airports.dat) where as the new source (which is listed on the openflights website) is [updated daily(!)](https://github.com/davidmegginson/ourairports-data/commits/main/airports.csv)
diff --git a/README.md b/README.md
index fe65b6c..922dce1 100644
--- a/README.md
+++ b/README.md
@@ -13,14 +13,16 @@ def deps do
 end
 ```
 
-## Adding timezone to the Airports data
+## Updating airports data with timezone
 
-Airports depends on [tz_world](https://github.com/kimlai/tz_world) for timezone data. After updating `priv/airports.csv`, run the following to add timezone data:
+Airports depends on [tz_world](https://github.com/kimlai/tz_world) for timezone data. Update airports and timezone data by running the following command:
 
 ```elixir
 mix airports.update
 ```
 
+This command will automatically download the latest airports data from the data source, put timezone data for each airport, and save it to `priv/airports.csv` and `priv/airports_with_tz.csv` respectively.
+
 ## Contributing
 
 Before opening a pull request, please open an issue first.