diff --git a/README.md b/README.md
index b209124..186e214 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,10 @@
 This program is only distributed in source form and you'll need a Rust compiler to run it. See [rustup.rs](http://rustup.rs) for installation instructions.
 
 The tool accepts two arguments:
-1. a catalogue name (or an alias; see below)
+1. a catalog name (or an alias; see below)
 2. a target directory
 
-Most catalogues (→ lectures) require a TUMonline authentification. Those can either be supplied as environment variables or in a `.env` file (see `.example.env`; under Windows you have to rename the file to `.env.` and the last dot will be automatically removed by Windows Explorer).
+Most catalogs (→ lectures) require a TUMonline authentification. Those can either be supplied as environment variables or in a `.env` file (see `.example.env`; under Windows you have to rename the file to `.env.` and the last dot will be automatically removed by Windows Explorer).
 
 ## Example
 
@@ -16,7 +16,7 @@ TUM_USERNAME=ab34efg TUM_PASSWORD=hunter2 cargo run -- DS ds
 
 (Note: `cargo` is the the standard build tool for Rust programs. `--` passes all the following arguments to the executed program instead of interpreting them as arguments to `cargo`.)
 
-## Aliased catalogue names
+## Aliased catalog names
 
 ### WS16/17
 - `DS`
@@ -27,11 +27,11 @@ TUM_USERNAME=ab34efg TUM_PASSWORD=hunter2 cargo run -- DS ds
 - `GAD`
 - `LA`
 
-## How to determine a catalogue name
+## How to determine a catalog name
 
 Open the Mediasite listing page, right-click and "View page source" (or "View frame source" if the listing is embedded in moodle).
 You should spot something like
 ```
 <form name="MainForm" method="post" action="/Mediasite/Catalog/catalogs/17s-lineare-algebra-fuer-informatik" id="MainForm">
 ```
-in the first couple of lines. Here the catalogue name would be `17s-lineare-algebra-fuer-informatik`.
+in the first couple of lines. Here the catalog name would be `17s-lineare-algebra-fuer-informatik`.