diff --git a/internal/model/widget-templates.go b/internal/model/widget-templates.go
index 614fa1a..3c68ad0 100644
--- a/internal/model/widget-templates.go
+++ b/internal/model/widget-templates.go
@@ -79,8 +79,11 @@ async function playAudio(audioUrl) {
 function playSpeech(text) {
 	audioUrl = fetch(ttsUrl + '/generate', {
 		method: 'POST',
+		headers: {
+    		'Content-Type': 'application/json;charset=utf-8'
+  		},
 		body: JSON.stringify({
-			"text": text,
+			text: text,
 		}),
 	}).then(
 		response => {