diff --git a/apps/activityreminder/app.js b/apps/activityreminder/app.js
index 7338984dc..f3d72976e 100644
--- a/apps/activityreminder/app.js
+++ b/apps/activityreminder/app.js
@@ -37,6 +37,6 @@ const storage = require("Storage");
 g.clear();
 Bangle.loadWidgets();
 Bangle.drawWidgets();
-activityreminder_settings = activityreminder.loadSettings();
-activityreminder_data = activityreminder.loadData();
+const activityreminder_settings = activityreminder.loadSettings();
+const activityreminder_data = activityreminder.loadData();
 run();
diff --git a/apps/activityreminder/boot.js b/apps/activityreminder/boot.js
index bc07ebc28..12e91bc12 100644
--- a/apps/activityreminder/boot.js
+++ b/apps/activityreminder/boot.js
@@ -1,8 +1,8 @@
 function run() {
     if (isNotWorn()) return;
-    var now = new Date();
-    var h = now.getHours();
-    var health = Bangle.getHealthStatus("day");
+    let now = new Date();
+    let h = now.getHours();
+    let health = Bangle.getHealthStatus("day");
 
     if (h >= activityreminder_settings.startHour && h < activityreminder_settings.endHour) {
         if (health.steps - activityreminder_data.stepsOnDate >= activityreminder_settings.minSteps // more steps made than needed
@@ -25,9 +25,9 @@ function isNotWorn() {
 }
 
 const activityreminder = require("activityreminder");
-activityreminder_settings = activityreminder.loadSettings();
+const activityreminder_settings = activityreminder.loadSettings();
 if (activityreminder_settings.enabled) {
-    activityreminder_data = activityreminder.loadData();
+    const activityreminder_data = activityreminder.loadData();
     if(activityreminder_data.firstLoad){
         activityreminder_data.firstLoad =false;
         activityreminder.saveData(activityreminder_data);
diff --git a/apps/activityreminder/lib.js b/apps/activityreminder/lib.js
index 141579cae..677e4cc0b 100644
--- a/apps/activityreminder/lib.js
+++ b/apps/activityreminder/lib.js
@@ -21,8 +21,8 @@ exports.saveData = function (data) {
 };
 
 exports.loadData = function () {
-    var health = Bangle.getHealthStatus("day");
-    var data = Object.assign({
+    let health = Bangle.getHealthStatus("day");
+    const data = Object.assign({
         firstLoad: true,
         stepsDate: new Date(),
         stepsOnDate: health.steps,
@@ -45,7 +45,7 @@ exports.loadData = function () {
 };
 
 exports.mustAlert = function(activityreminder_data, activityreminder_settings) {
-    var now = new Date();
+    let now = new Date();
     if ((now - activityreminder_data.stepsDate) / 60000 > activityreminder_settings.maxInnactivityMin) { // inactivity detected
         if ((now - activityreminder_settings.okDate) / 60000 > 3 && // last alert anwsered with ok was more than 3 min ago
             (now - activityreminder_settings.dismissDate) / 60000 > activityreminder_settings.dismissDelayMin && // last alert was more than dismissDelayMin ago
diff --git a/apps/activityreminder/settings.js b/apps/activityreminder/settings.js
index 134279f41..9dff61f48 100644
--- a/apps/activityreminder/settings.js
+++ b/apps/activityreminder/settings.js
@@ -1,7 +1,7 @@
 (function (back) {
   // Load settings
   const activityreminder = require("activityreminder");
-  var settings = activityreminder.loadSettings();
+  const settings = activityreminder.loadSettings();
 
   // Show the menu
   E.showMenu({