diff --git a/alexa-api/server.js b/alexa-api/server.js
index d458e58..67ba5b8 100644
--- a/alexa-api/server.js
+++ b/alexa-api/server.js
@@ -132,14 +132,13 @@ app.post('/speak', async function(req, res) {
       '@type': 'com.amazon.alexa.behaviors.model.Sequence',
       startNode: {
         '@type': 'com.amazon.alexa.behaviors.model.OpaquePayloadOperationNode',
-        type: 'Alexa.Speak',
+        type: 'Alexa.SpeakSsml',   // ← ここ変更
         operationPayload: {
           deviceType: target.deviceType,
           deviceSerialNumber: target.serialNumber,
           customerId: customerId,
           locale: 'ja-JP',
-          textToSpeak: text,
-          speakType: 'ssml'
+          textToSpeak: text
         },
       },
     };