diff --git a/docs/CONTRIBUTING.md b/docs/CONTRIBUTING.md
index e1c9dada..c074d07f 100644
--- a/docs/CONTRIBUTING.md
+++ b/docs/CONTRIBUTING.md
@@ -87,6 +87,9 @@ make electron-develop
 #### GUI
 
 ```sh
+# Build the GUI
+make webpack
+# Start Electron
 npm start
 ```