diff --git a/system/src/Grav/Common/Data/Validation.php b/system/src/Grav/Common/Data/Validation.php
index f8e0c3119..059ea92cd 100644
--- a/system/src/Grav/Common/Data/Validation.php
+++ b/system/src/Grav/Common/Data/Validation.php
@@ -283,7 +283,7 @@ class Validation
 
     protected static function filterFile($value, array $params, array $field)
     {
-        if (isset($field['multiple']) && $field['multiple'] == true) {
+        if (isset($field['multiple']) && $field['multiple'] === true) {
             return (array) $value;
         }
 
diff --git a/system/src/Grav/Common/Grav.php b/system/src/Grav/Common/Grav.php
index 669d91cee..e8a9108aa 100644
--- a/system/src/Grav/Common/Grav.php
+++ b/system/src/Grav/Common/Grav.php
@@ -318,7 +318,7 @@ class Grav extends Container
             $code = $matches[2];
         }
 
-        if ($code == null) {
+        if ($code === null) {
             $code = $this['config']->get('system.pages.redirect_default_code', 301);
         }
 
diff --git a/system/src/Grav/Common/Page/Page.php b/system/src/Grav/Common/Page/Page.php
index c32c96360..a4c9c0b43 100644
--- a/system/src/Grav/Common/Page/Page.php
+++ b/system/src/Grav/Common/Page/Page.php
@@ -528,7 +528,7 @@ class Page
 
 
             // if no cached-content run everything
-            if ($this->content === false || $cache_enable == false) {
+            if ($this->content === false || $cache_enable === false) {
                 $this->content = $this->raw_content;
                 self::getGrav()->fireEvent('onPageContentRaw', new Event(['page' => $this]));
 
@@ -1881,7 +1881,7 @@ class Page
 
         while (true) {
             $theParent = $topParent->parent();
-            if ($theParent != null && $theParent->parent() !== null) {
+            if ($theParent !== null && $theParent->parent() !== null) {
                 $topParent = $theParent;
             } else {
                 break;
diff --git a/system/src/Grav/Common/Uri.php b/system/src/Grav/Common/Uri.php
index 16a0b31d7..4a7006447 100644
--- a/system/src/Grav/Common/Uri.php
+++ b/system/src/Grav/Common/Uri.php
@@ -258,7 +258,7 @@ class Uri
         $language = $grav['language'];
 
         // add the port to the base for non-standard ports
-        if ($config->get('system.reverse_proxy_setup') == false && $this->port != '80' && $this->port != '443') {
+        if ($config->get('system.reverse_proxy_setup') === false && $this->port != '80' && $this->port != '443') {
             $this->base .= ":" . $this->port;
         }