diff --git a/Animation/Canvas/ParticleAnimation.js b/Animation/Canvas/ParticleAnimation.js
index 2d23a7d..4e53ed7 100644
--- a/Animation/Canvas/ParticleAnimation.js
+++ b/Animation/Canvas/ParticleAnimation.js
@@ -134,7 +134,7 @@
             particle.setPosition(pos.x, pos.y);
             particle.setVelocity(vel.x, vel.y);
 
-            for (let j = i + 1; j < length; j++) {
+            for (let j = i + 1; j < length; ++j) {
                 this.updateDistance(particle, this.particles[j]);
             }
         }
diff --git a/Chart/CalendarChart.js b/Chart/CalendarChart.js
index 3f9bb61..7e32230 100644
--- a/Chart/CalendarChart.js
+++ b/Chart/CalendarChart.js
@@ -93,7 +93,7 @@
 
                     let dataLength = self.chart.dataset[i].points.length;
 
-                    for (let j = 0; j < dataLength; j++) {
+                    for (let j = 0; j < dataLength; ++j) {
                         if (self.chart.dataset[i].points[j].x === d) {
                             return true;
                         }
@@ -115,7 +115,7 @@
 
                     let dataLength = self.chart.dataset[i].points.length;
 
-                    for (let j = 0; j < dataLength; j++) {
+                    for (let j = 0; j < dataLength; ++j) {
                         if (self.chart.dataset[i].points[j].x === d) {
                              return "day " + self.chart.color(self.chart.dataset[i].points[j].y);
                         }
@@ -136,7 +136,7 @@
 
                     let dataLength = self.chart.dataset[i].points.length;
 
-                    for (let j = 0; j < dataLength; j++) {
+                    for (let j = 0; j < dataLength; ++j) {
                         if (self.chart.dataset[i].points[j].x === d) {
                              return d + ": " + self.chart.dataset[i].points[j].y;
                         }
diff --git a/Security/Hash/Sha1.js b/Security/Hash/Sha1.js
index 64035e8..a53f355 100644
--- a/Security/Hash/Sha1.js
+++ b/Security/Hash/Sha1.js
@@ -8,7 +8,7 @@ SHA1 = function (l)
     l += '€';
     for (var n = Math, c = [1518500249, 1859775393, 2400959708, 3395469782, 1732584193, 4023233417, 2562383102, 271733878, 3285377520, 4294967295], s = n.ceil(l.length / 4) + 2, q = n.ceil(s / 16), g = [], a = 0, h = [], j, d, e, f, m, i, b, k; a < q; a++) {
         g[a] = [];
-        for (k = 0; k < 16; k++) {
+        for (k = 0; k < 16; ++k) {
             function o(b, c)
             {
                 return l.charCodeAt(a * 64 + k * 4 + b) << c
diff --git a/Spreadsheet/Spreadsheet.js b/Spreadsheet/Spreadsheet.js
index c1be26c..12949ce 100644
--- a/Spreadsheet/Spreadsheet.js
+++ b/Spreadsheet/Spreadsheet.js
@@ -36,7 +36,7 @@
         for (let i = 0; i < cRows; ++i) {
             cCols = this.compiledData[i].length();
 
-            for (j = 0; j < cCols; j++) {
+            for (j = 0; j < cCols; ++j) {
                 this.compiledData[i][j] = Functions.evaluate(this.compiledData[i][j], compiledData);
 
                 this.drawCell(this.compiledData[i][j]);
diff --git a/UI/ActionManager.js b/UI/ActionManager.js
index 9128474..9e929f7 100644
--- a/UI/ActionManager.js
+++ b/UI/ActionManager.js
@@ -79,7 +79,7 @@
 
             let childLength = c.length;
 
-            for (let j = 0; j < childLength; j++) {
+            for (let j = 0; j < childLength; ++j) {
                 this.bindListener(c[j], listeners[i]);
             }
 
@@ -94,7 +94,7 @@
                 this.app.eventManager.attach(e.id + 'childList', function(data) {
                     const length = data.addedNodes.length;
 
-                    for (let j = 0; j < length; j++) {
+                    for (let j = 0; j < length; ++j) {
                         self.bindListener(data.addedNodes[j], listeners[i]);
                     }
 
@@ -125,7 +125,7 @@
         const self       = this,
             actionLength = listener.action.length;
 
-        for (let j = 1; j < actionLength; j++) {
+        for (let j = 1; j < actionLength; ++j) {
             this.app.eventManager.attach(e.id + listener.key + listener.action[j - 1].key, function (data)
             {
                 self.runAction(e, listener, listener.action[j], data);
diff --git a/UI/Component/Form.js b/UI/Component/Form.js
index d658828..91fe1e5 100644
--- a/UI/Component/Form.js
+++ b/UI/Component/Form.js
@@ -215,7 +215,7 @@
                     success        = null;
 
                 /* Handle responses (can be multiple response object) */
-                for (let k = 0; k < responseLength; k++) {
+                for (let k = 0; k < responseLength; ++k) {
                     tempResponse = response.getByIndex(k);
 
                     if ((success = form.getSuccess()) !== null) {
diff --git a/UI/Component/Input.js b/UI/Component/Input.js
index f687ff2..6ed4cfa 100644
--- a/UI/Component/Input.js
+++ b/UI/Component/Input.js
@@ -117,7 +117,7 @@
                 let tempResponse   = null,
                     success        = null;
 
-                for (let k = 0; k < responseLength; k++) {
+                for (let k = 0; k < responseLength; ++k) {
                     tempResponse = response.getByIndex(k);
 
                     let option = null,
diff --git a/UI/Input/Keyboard/KeyboardManager.js b/UI/Input/Keyboard/KeyboardManager.js
index a2e5773..3ee4432 100644
--- a/UI/Input/Keyboard/KeyboardManager.js
+++ b/UI/Input/Keyboard/KeyboardManager.js
@@ -90,7 +90,7 @@
         let match     = false;
 
         for (let i = 0; i < length; ++i) {
-            for (let j = 0; j < keyLength; j++) {
+            for (let j = 0; j < keyLength; ++j) {
                 if (actions[i].keys.indexOf(this.down[j]) === -1) {
                     match = false;