diff --git a/src/com.gabe565.nightscout.sdPlugin/js/Nightscout.js b/src/com.gabe565.nightscout.sdPlugin/js/Nightscout.js
index abbb760..8fc0a18 100644
--- a/src/com.gabe565.nightscout.sdPlugin/js/Nightscout.js
+++ b/src/com.gabe565.nightscout.sdPlugin/js/Nightscout.js
@@ -9,26 +9,33 @@ class Nightscout {
     this.context = context;
     this.url = "";
     this.request = { headers: {} };
-    this.settings = settings;
+    this.setSettings(settings);
     nightscoutMap[context] = this;
   }
 
-  set settings(settings) {
-    this._settings = settings;
+  async setSettings(settings) {
+    this.settings = settings;
     if (this.settings.nightscoutUrl) {
-      this.url = new URL(this.settings.nightscoutUrl);
-      this.url.pathname += "api/v2/properties";
       if (this.settings.token) {
-        this.request.headers["Api-Secret"] = this.settings.token;
+        try {
+          const buffer = new TextEncoder().encode(this.settings.token);
+          const hashBuffer = await crypto.subtle.digest("SHA-1", buffer);
+          const hashArray = Array.from(new Uint8Array(hashBuffer));
+          this.request.headers["Api-Secret"] = hashArray
+            .map((b) => b.toString(16).padStart(2, "0"))
+            .join("");
+        } catch (err) {
+          console.error(err);
+          this.request.headers["Api-Secret"] = this.settings.token;
+          $SD.showAlert(this.context);
+        }
       }
+      this.url = new URL(this.settings.nightscoutUrl);
+      this.url.pathname += "api/v2/properties";
       this.beginTick();
     }
   }
 
-  get settings() {
-    return this._settings;
-  }
-
   async tick() {
     if (!this.url) {
       return;
diff --git a/src/com.gabe565.nightscout.sdPlugin/js/app.js b/src/com.gabe565.nightscout.sdPlugin/js/app.js
index 1caed1b..6cf96b5 100644
--- a/src/com.gabe565.nightscout.sdPlugin/js/app.js
+++ b/src/com.gabe565.nightscout.sdPlugin/js/app.js
@@ -4,8 +4,8 @@
 
 const nightscoutAction = new Action("com.gabe565.nightscout.action");
 
-nightscoutAction.onDidReceiveSettings(
-  (data) => (new Nightscout(data).settings = data.payload.settings),
+nightscoutAction.onDidReceiveSettings((data) =>
+  new Nightscout(data).setSettings(data.payload.settings),
 );
 
 nightscoutAction.onKeyDown((data) => new Nightscout(data).beginTick());