diff --git a/js/buttons/RectangularRadioButton.js b/js/buttons/RectangularRadioButton.ts
similarity index 100%
rename from js/buttons/RectangularRadioButton.js
rename to js/buttons/RectangularRadioButton.ts
diff --git a/js/buttons/RectangularRadioButtonGroup.js b/js/buttons/RectangularRadioButtonGroup.ts
similarity index 100%
rename from js/buttons/RectangularRadioButtonGroup.js
rename to js/buttons/RectangularRadioButtonGroup.ts