diff --git a/src/helpers.js b/src/helpers.js
index 0a05fcf..605b764 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -8,7 +8,7 @@ export function loadScript (url) {
     const script = document.createElement('script')
     script.async = true
     script.src = url
-    script.charset = 'utf8'
+    script.charset = 'utf-8'
 
     head.appendChild(script)
 
@@ -118,4 +118,4 @@ export const promisify = value => {
   }
 
   return Promise.resolve(value)
-}
\ No newline at end of file
+}