diff --git a/lib/create-icon-set.js b/lib/create-icon-set.js
index 07b03df..88ed831 100644
--- a/lib/create-icon-set.js
+++ b/lib/create-icon-set.js
@@ -56,7 +56,7 @@ export default function createIconSet(glyphMap, fontFamily, fontFile) {
         glyph = String.fromCharCode(glyph);
       }
 
-      const styleDefaults:Object = {
+      const styleDefaults = {
         fontSize: size,
         fontWeight: 'normal',
         fontStyle: 'normal',
@@ -76,7 +76,7 @@ export default function createIconSet(glyphMap, fontFamily, fontFile) {
 
   let imageSourceCache = {};
 
-  function getImageSource(name, size = DEFAULT_ICON_SIZE : number, color = DEFAULT_ICON_COLOR) : Promise {
+  function getImageSource(name, size = DEFAULT_ICON_SIZE, color = DEFAULT_ICON_COLOR) {
     if (!NativeIconAPI) {
       if (Platform.OS === 'android') {
         throw new Error('RNVectorIconsModule not available, did you properly integrate the module?');