diff --git a/Gemfile.lock b/Gemfile.lock
index 78bdb8e0..9a4447a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    jekyll-theme-conference (3.1.0)
+    jekyll-theme-conference (3.1.1)
       jekyll (~> 4.0)
 
 GEM
diff --git a/_includes/js/conference-live.js b/_includes/js/conference-live.js
index 0a3e124c..4e0fed67 100644
--- a/_includes/js/conference-live.js
+++ b/_includes/js/conference-live.js
@@ -101,7 +101,7 @@ window.conference.live = (function() {
         }
     };
 
-    let resetTime = function (timeStr) {
+    let resetTime = function () {
         // Reset app time
         timeOffset = 0;
         freezeTime = false;
@@ -109,12 +109,15 @@ window.conference.live = (function() {
         startUpdate();
     };
 
-    let setTime = function (newTime, newDay=1) {
+    let setTime = function (newTime, newDay) {
         // Set and pause app time
         pauseTime();
 
         let dayIdx;
-        if (Number.isInteger(newDay)) {
+        if (arguments.length < 2) {
+            dayIdx = 0;
+        }
+        else if (Number.isInteger(newDay)) {
             dayIdx = newDay-1;
         }
         else if (/^[0-9]{4}-[0-9]{2}-[0-9]{2}$/.test(newDay)) {
@@ -123,7 +126,7 @@ window.conference.live = (function() {
         else {
             dayIdx = data.days.find(o => o.name === newDay);
         }
-        newDate = data.days[dayIdx].date;
+        let newDate = data.days[dayIdx].date;
 
         let d = new Date(newDate);
         newTime = newTime.split(':');
@@ -134,8 +137,10 @@ window.conference.live = (function() {
         update();
     };
 
-    let getTime = function (tConvert=time()) {
+    let getTime = function () {
         // Return app time as string
+        let tConvert = time();
+
         let d = new Date(tConvert * 1000);
         let dStr = d.toISOString().slice(0,10);
         let h = d.getHours();
@@ -564,7 +569,7 @@ window.conference.live = (function() {
             }
         };
 
-        let hideModal = function (event) {
+        let hideModal = function () {
             // Close stream modal
             streamModal.find('iframe').attr('src', '');
             streamModal.find('.modal-footer .btn').removeClass('active');
@@ -581,8 +586,8 @@ window.conference.live = (function() {
                 let roomName = button.data('room');
                 setStream(roomName);
             });
-            streamModal.on('hide.bs.modal', function (event) {
-                hideModal(event);
+            streamModal.on('hide.bs.modal', function () {
+                hideModal();
             });
 
             // configure room selection buttons in modal
diff --git a/_includes/js/conference-map.js b/_includes/js/conference-map.js
index 96ea9d2c..5b73dfa2 100644
--- a/_includes/js/conference-map.js
+++ b/_includes/js/conference-map.js
@@ -24,7 +24,7 @@ window.conference.mapConfig = (function() {
     };
 
     let init = function () {
-        elId = 'map';
+        let elId = 'map';
 
         if (document.getElementById(elId)) {
             setup(elId);
diff --git a/_includes/js/conference-modal.js b/_includes/js/conference-modal.js
index 12fae9de..4134a7d9 100644
--- a/_includes/js/conference-modal.js
+++ b/_includes/js/conference-modal.js
@@ -51,7 +51,7 @@ window.conference.modal = (function () {
         }
     };
 
-    let hide = function (el, event) {
+    let hide = function (el) {
         let modal = $(el);
 
         modal.find('.modal-title h3').text('');
@@ -61,13 +61,13 @@ window.conference.modal = (function () {
     };
 
     let init = function() {
-        elSel = '#link-modal';
+        let elSel = '#link-modal';
 
         $(elSel).on('show.bs.modal', function (event) {
             show(this, event);
         });
-        $(elSel).on('hide.bs.modal', function (event) {
-            hide(this, event);
+        $(elSel).on('hide.bs.modal', function () {
+            hide(this);
         });
     };
 
diff --git a/_includes/js/conference-program.js b/_includes/js/conference-program.js
index 4c4d7b2d..71243b0b 100644
--- a/_includes/js/conference-program.js
+++ b/_includes/js/conference-program.js
@@ -34,7 +34,7 @@ window.conference.program = (function() {
             }
 
             // Add current selected day as hash to URL while keeping current scrolling position
-            $('a[data-toggle="tab"]').on('shown.bs.tab', function (e) {
+            $('a[data-toggle="tab"]').on('shown.bs.tab', function () {
                 updateHash(this.hash);
             });
         }
diff --git a/_includes/js/syncscroll.js b/_includes/js/syncscroll.js
index 5e1446c8..52972e0a 100644
--- a/_includes/js/syncscroll.js
+++ b/_includes/js/syncscroll.js
@@ -29,7 +29,7 @@ function (exports) {
         var elems = document.getElementsByClassName('syncscroll');
         var i, j, el, found, name;
         for (name in names) {
-            if (names.hasOwnProperty(name)) {
+            if (Object.prototype.hasOwnProperty.call(names, name)) {
                 for (i = 0; i < names[name].length; i++) {
                     names[name][i].removeEventListener(
                         'scroll', names[name][i].syn, 0
diff --git a/jekyll-theme-conference.gemspec b/jekyll-theme-conference.gemspec
index aa612413..2c2d5be8 100644
--- a/jekyll-theme-conference.gemspec
+++ b/jekyll-theme-conference.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-theme-conference"
-  spec.version       = "3.1.0"
+  spec.version       = "3.1.1"
   spec.authors       = ["Lorenz Schmid"]
   spec.email         = ["lorenzschmid@users.noreply.github.com"]