diff --git a/README.md b/README.md
index e9f19c8..8085dde 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ To install `npm install @recogito/recogito-client-core`
 ## Contributing UI Translations
 
 If you want to contribute UI translations to Annotorious or RecogitoJS, you've come to the right place.
-In [this folder](https://github.com/recogito/recogito-client-core/tree/master/src/i18n) 
+In [this folder](https://github.com/recogito/recogito-client-core/tree/main/src/i18n) 
 you will find `messages` files, one file for each available translation. 
 
 Each `messages` file is a dictionary of the default English labels and their translations. For example, 
@@ -30,7 +30,7 @@ here's what the German translation file `messages_de.json` looks like.
 ### To add a new translation
 
 - Fork the this repository
-- Add a message file to the [src/i18n folder](https://github.com/recogito/recogito-client-core/tree/master/src/i18n) 
+- Add a message file to the [src/i18n folder](https://github.com/recogito/recogito-client-core/tree/main/src/i18n) 
   named `messages_{iso}.json`, where {iso} is the 2-character ISO code of the language.
 - Copy the dictionary above, and replace the translations accordingly.
 - [Send us a pull request](https://www.freecodecamp.org/news/how-to-make-your-first-pull-request-on-github-3/)