diff --git a/frontend/src/helpers/encoding.js b/frontend/src/helpers/encoding.js
index 391c9e8..ca92e67 100644
--- a/frontend/src/helpers/encoding.js
+++ b/frontend/src/helpers/encoding.js
@@ -1,7 +1,7 @@
 export function base64_url_encode(input) {
   let output = btoa(input)
-  output = output.replace('+', '.')
-  output = output.replace('/', '_')
-  output = output.replace('=', '-')
+  output = output.replaceAll('+', '.')
+  output = output.replaceAll('/', '_')
+  output = output.replaceAll('=', '-')
   return output
 }
\ No newline at end of file