diff --git a/app/Template/analytic/avg_time_columns.php b/app/Template/analytic/avg_time_columns.php
index e74e79503..7b9d7cf99 100644
--- a/app/Template/analytic/avg_time_columns.php
+++ b/app/Template/analytic/avg_time_columns.php
@@ -7,7 +7,7 @@
 <?php else: ?>
     <section id="analytic-avg-time-column">
 
-        <div id="chart" data-metrics='<?= json_encode($metrics) ?>' data-label="<?= t('Average time spent') ?>"></div>
+        <div id="chart" data-metrics='<?= json_encode($metrics, JSON_HEX_APOS) ?>' data-label="<?= t('Average time spent') ?>"></div>
 
         <table class="table-stripped">
         <tr>
diff --git a/app/Template/analytic/burndown.php b/app/Template/analytic/burndown.php
index 59f15223b..3dfb6ee81 100644
--- a/app/Template/analytic/burndown.php
+++ b/app/Template/analytic/burndown.php
@@ -6,7 +6,7 @@
     <p class="alert"><?= t('You need at least 2 days of data to show the chart.') ?></p>
 <?php else: ?>
     <section id="analytic-burndown">
-        <div id="chart" data-metrics='<?= json_encode($metrics) ?>' data-date-format="<?= e('%%Y-%%m-%%d') ?>" data-label-total="<?= t('Total for all columns') ?>"></div>
+        <div id="chart" data-metrics='<?= json_encode($metrics, JSON_HEX_APOS) ?>' data-date-format="<?= e('%%Y-%%m-%%d') ?>" data-label-total="<?= t('Total for all columns') ?>"></div>
     </section>
 <?php endif ?>
 
diff --git a/app/Template/analytic/cfd.php b/app/Template/analytic/cfd.php
index ab706d560..45f53e0fe 100644
--- a/app/Template/analytic/cfd.php
+++ b/app/Template/analytic/cfd.php
@@ -6,7 +6,7 @@
     <p class="alert"><?= t('You need at least 2 days of data to show the chart.') ?></p>
 <?php else: ?>
     <section id="analytic-cfd">
-        <div id="chart" data-metrics='<?= json_encode($metrics) ?>' data-date-format="<?= e('%%Y-%%m-%%d') ?>"></div>
+        <div id="chart" data-metrics='<?= json_encode($metrics, JSON_HEX_APOS) ?>' data-date-format="<?= e('%%Y-%%m-%%d') ?>"></div>
     </section>
 <?php endif ?>
 
diff --git a/app/Template/analytic/lead_cycle_time.php b/app/Template/analytic/lead_cycle_time.php
index d96bdcb8b..8e04bd6d3 100644
--- a/app/Template/analytic/lead_cycle_time.php
+++ b/app/Template/analytic/lead_cycle_time.php
@@ -14,7 +14,7 @@
 <?php else: ?>
     <section id="analytic-lead-cycle-time">
 
-        <div id="chart" data-metrics='<?= json_encode($metrics) ?>' data-label-cycle="<?= t('Cycle Time') ?>" data-label-lead="<?= t('Lead Time') ?>"></div>
+        <div id="chart" data-metrics='<?= json_encode($metrics, JSON_HEX_APOS) ?>' data-label-cycle="<?= t('Cycle Time') ?>" data-label-lead="<?= t('Lead Time') ?>"></div>
 
         <form method="post" class="form-inline" action="<?= $this->url->href('analytic', 'leadAndCycleTime', array('project_id' => $project['id'])) ?>" autocomplete="off">
 
diff --git a/app/Template/analytic/tasks.php b/app/Template/analytic/tasks.php
index 36f36a230..7392ee568 100644
--- a/app/Template/analytic/tasks.php
+++ b/app/Template/analytic/tasks.php
@@ -7,7 +7,7 @@
 <?php else: ?>
     <section id="analytic-task-repartition">
 
-    <div id="chart" data-metrics='<?= json_encode($metrics) ?>'></div>
+    <div id="chart" data-metrics='<?= json_encode($metrics, JSON_HEX_APOS) ?>'></div>
 
     <table>
         <tr>
diff --git a/app/Template/analytic/users.php b/app/Template/analytic/users.php
index 263ea0efd..514d71336 100644
--- a/app/Template/analytic/users.php
+++ b/app/Template/analytic/users.php
@@ -7,7 +7,7 @@
 <?php else: ?>
     <section id="analytic-user-repartition">
 
-    <div id="chart" data-metrics='<?= json_encode($metrics) ?>'></div>
+    <div id="chart" data-metrics='<?= json_encode($metrics, JSON_HEX_APOS) ?>'></div>
 
     <table>
         <tr>
diff --git a/app/Template/budget/index.php b/app/Template/budget/index.php
index 80153bbd7..51ef3d870 100644
--- a/app/Template/budget/index.php
+++ b/app/Template/budget/index.php
@@ -6,8 +6,8 @@
 <div id="budget-chart">
     <div id="chart"
          data-date-format="<?= e('%%Y-%%m-%%d') ?>"
-         data-metrics='<?= json_encode($daily_budget) ?>'
-         data-labels='<?= json_encode(array('in' => t('Budget line'), 'out' => t('Expenses'), 'left' => t('Remaining'), 'value' => t('Amount'), 'date' => t('Date'), 'type' => t('Type'))) ?>'></div>
+         data-metrics='<?= json_encode($daily_budget, JSON_HEX_APOS) ?>'
+         data-labels='<?= json_encode(array('in' => t('Budget line'), 'out' => t('Expenses'), 'left' => t('Remaining'), 'value' => t('Amount'), 'date' => t('Date'), 'type' => t('Type')), JSON_HEX_APOS) ?>'></div>
 </div>
 <hr/>
 <table class="table-fixed table-stripped">
diff --git a/app/Template/gantt/project.php b/app/Template/gantt/project.php
index 0c545be83..ec45f7f6e 100644
--- a/app/Template/gantt/project.php
+++ b/app/Template/gantt/project.php
@@ -35,7 +35,7 @@
     <?php if (! empty($tasks)): ?>
         <div
             id="gantt-chart"
-            data-tasks='<?= json_encode($tasks) ?>'
+            data-tasks='<?= json_encode($tasks, JSON_HEX_APOS) ?>'
             data-save-url="<?= $this->url->href('gantt', 'saveDate', array('project_id' => $project['id'])) ?>"
             data-label-start-date="<?= t('Start date:') ?>"
             data-label-end-date="<?= t('Due date:') ?>"
diff --git a/app/Template/task/analytics.php b/app/Template/task/analytics.php
index 3b1d2855e..306dd0216 100644
--- a/app/Template/task/analytics.php
+++ b/app/Template/task/analytics.php
@@ -10,7 +10,7 @@
 </div>
 
 <h3 id="analytic-task-time-column"><?= t('Time spent into each column') ?></h3>
-<div id="chart" data-metrics='<?= json_encode($time_spent_columns) ?>' data-label="<?= t('Time spent') ?>"></div>
+<div id="chart" data-metrics='<?= json_encode($time_spent_columns, JSON_HEX_APOS) ?>' data-label="<?= t('Time spent') ?>"></div>
 <table class="table-stripped">
     <tr>
         <th><?= t('Column') ?></th>