diff --git a/js/worker.js b/js/worker.js
index 8916112c..74e4695b 100644
--- a/js/worker.js
+++ b/js/worker.js
@@ -1417,7 +1417,7 @@ async function doPrediction({
     start = 0,
     end = metadata[file].duration,
 }) {
-    if (file.endsWith('.wav')){
+    if (file.toLowerCase().endsWith('.wav')){
         await getWavePredictBuffers({ file: file, start: start, end: end }).catch( (error) => console.warn(error));
     } else {
         await getPredictBuffers({ file: file, start: start, end: end }).catch( (error) => console.warn(error));
diff --git a/package.json b/package.json
index 0c4c1742..82f1da90 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "chirpity",
-  "version": "1.6.5",
+  "version": "1.6.6",
   "description": "Chirpity Nocmig",
   "main": "main.js",
   "scripts": {