diff --git a/app/Core/Csv.php b/app/Core/Csv.php
index 880101661..fdff9fe04 100644
--- a/app/Core/Csv.php
+++ b/app/Core/Csv.php
@@ -94,7 +94,7 @@ class Csv
     {
         if (! empty($value)) {
             $value = trim(strtolower($value));
-            return $value === '1' || $value{0} === 't' || $value{0} === 'y' ? 1 : 0;
+            return $value === '1' || $value[0] === 't' || $value[0] === 'y' ? 1 : 0;
         }
 
         return 0;
diff --git a/app/Core/Http/Route.php b/app/Core/Http/Route.php
index 9b45b7255..3d9eaeaaa 100644
--- a/app/Core/Http/Route.php
+++ b/app/Core/Http/Route.php
@@ -100,7 +100,7 @@ class Route extends Base
                 $params = array();
 
                 for ($i = 0; $i < $count; $i++) {
-                    if ($route['items'][$i]{0} === ':') {
+                    if ($route['items'][$i][0] === ':') {
                         $params[substr($route['items'][$i], 1)] = $items[$i];
                     } elseif ($route['items'][$i] !== $items[$i]) {
                         break;
@@ -177,7 +177,7 @@ class Route extends Base
         $params = array();
 
         foreach ($items as $item) {
-            if ($item !== '' && $item{0} === ':') {
+            if ($item !== '' && $item[0] === ':') {
                 $params[substr($item, 1)] = true;
             }
         }
diff --git a/app/Core/Http/Router.php b/app/Core/Http/Router.php
index 4de276a00..530b46ae7 100644
--- a/app/Core/Http/Router.php
+++ b/app/Core/Http/Router.php
@@ -86,7 +86,7 @@ class Router extends Base
             $path = substr($path, 0, - strlen($this->request->getQueryString()) - 1);
         }
 
-        if ($path !== '' && $path{0} === '/') {
+        if ($path !== '' && $path[0] === '/') {
             $path = substr($path, 1);
         }
 
diff --git a/app/Filter/TaskTitleFilter.php b/app/Filter/TaskTitleFilter.php
index 4e3a2df1a..f255ac814 100644
--- a/app/Filter/TaskTitleFilter.php
+++ b/app/Filter/TaskTitleFilter.php
@@ -32,7 +32,7 @@ class TaskTitleFilter extends BaseFilter implements FilterInterface
      */
     public function apply()
     {
-        if (ctype_digit($this->value) || (strlen($this->value) > 1 && $this->value{0} === '#' && ctype_digit(substr($this->value, 1)))) {
+        if (ctype_digit($this->value) || (strlen($this->value) > 1 && $this->value[0] === '#' && ctype_digit(substr($this->value, 1)))) {
             $this->query->beginOr();
             $this->query->eq(TaskModel::TABLE.'.id', str_replace('#', '', $this->value));
             $this->query->ilike(TaskModel::TABLE.'.title', '%'.$this->value.'%');
diff --git a/app/Formatter/ProjectActivityEventFormatter.php b/app/Formatter/ProjectActivityEventFormatter.php
index aa0ea7cdc..98eb560ea 100644
--- a/app/Formatter/ProjectActivityEventFormatter.php
+++ b/app/Formatter/ProjectActivityEventFormatter.php
@@ -37,7 +37,7 @@ class ProjectActivityEventFormatter extends BaseFormatter implements FormatterIn
      */
     protected function unserializeEvent($data)
     {
-        if ($data{0} === 'a') {
+        if ($data[0] === 'a') {
             return unserialize($data);
         }
 
diff --git a/app/Schema/Mysql.php b/app/Schema/Mysql.php
index b6507f8c0..f3ff6ed67 100644
--- a/app/Schema/Mysql.php
+++ b/app/Schema/Mysql.php
@@ -461,7 +461,7 @@ function version_99(PDO $pdo)
             $row['action_name'] = '\Kanboard\Action\TaskCloseColumn';
         } elseif ($row['action_name'] === 'TaskLogMoveAnotherColumn') {
             $row['action_name'] = '\Kanboard\Action\CommentCreationMoveTaskColumn';
-        } elseif ($row['action_name']{0} !== '\\') {
+        } elseif ($row['action_name'][0] !== '\\') {
             $row['action_name'] = '\Kanboard\Action\\'.$row['action_name'];
         }
 
diff --git a/app/Schema/Postgres.php b/app/Schema/Postgres.php
index f66b307dc..fb78197d5 100644
--- a/app/Schema/Postgres.php
+++ b/app/Schema/Postgres.php
@@ -353,7 +353,7 @@ function version_79(PDO $pdo)
             $row['action_name'] = '\Kanboard\Action\TaskCloseColumn';
         } elseif ($row['action_name'] === 'TaskLogMoveAnotherColumn') {
             $row['action_name'] = '\Kanboard\Action\CommentCreationMoveTaskColumn';
-        } elseif ($row['action_name']{0} !== '\\') {
+        } elseif ($row['action_name'][0] !== '\\') {
             $row['action_name'] = '\Kanboard\Action\\'.$row['action_name'];
         }
 
diff --git a/app/Schema/Sqlite.php b/app/Schema/Sqlite.php
index 1a61c3157..bc9ae01ea 100644
--- a/app/Schema/Sqlite.php
+++ b/app/Schema/Sqlite.php
@@ -324,7 +324,7 @@ function version_92(PDO $pdo)
             $row['action_name'] = '\Kanboard\Action\TaskCloseColumn';
         } elseif ($row['action_name'] === 'TaskLogMoveAnotherColumn') {
             $row['action_name'] = '\Kanboard\Action\CommentCreationMoveTaskColumn';
-        } elseif ($row['action_name']{0} !== '\\') {
+        } elseif ($row['action_name'][0] !== '\\') {
             $row['action_name'] = '\Kanboard\Action\\'.$row['action_name'];
         }