diff --git a/package-lock.json b/package-lock.json
index 894e9b8..ee7ec89 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1854,6 +1854,7 @@
       "hasInstallScript": true,
       "dependencies": {
         "node-addon-api": "^3.0.0",
+        "node-gyp": "3.x",
         "node-pre-gyp": "^0.11.0"
       },
       "optionalDependencies": {
diff --git a/tts/azure/index.js b/tts/azure/index.js
index 49d737a..38a8a27 100644
--- a/tts/azure/index.js
+++ b/tts/azure/index.js
@@ -46,7 +46,7 @@ module.exports = class AzureTTS extends BaseEngine {
         const res = await fetch(process.env.AZURE_LIST_ENDPOINT, opts);
         const json = await res.json();
         json.forEach((voice) => {
-            if (this.voices[voice.DisplayName]) {
+            if (this.voices[voice.DisplayName.toLowerCase()]) {
                 if (voice.Name.includes('Neural')) {
                     this.voices[voice.DisplayName.toLowerCase()] = voice.ShortName;
                 }