diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29de3baaf..df7b1b795 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 1. [](#new)
     * Added `Flex Pages` to Grav core and removed Flex Objects plugin dependency
     * Added `Utils::simpleTemplate()` method for very simple variable templating
+    * Added `array_diff()` twig function
 1. [](#improved)
     * Improved `Flex Users`: obey blueprints and allow Flex to be used in admin only
     * Improved `Flex` to support custom site template paths
diff --git a/system/src/Grav/Common/Twig/TwigExtension.php b/system/src/Grav/Common/Twig/TwigExtension.php
index dae938db9..4a093cf46 100644
--- a/system/src/Grav/Common/Twig/TwigExtension.php
+++ b/system/src/Grav/Common/Twig/TwigExtension.php
@@ -150,6 +150,7 @@ class TwigExtension extends AbstractExtension implements GlobalsInterface
             new TwigFunction('array_key_exists', 'array_key_exists'),
             new TwigFunction('array_unique', 'array_unique'),
             new TwigFunction('array_intersect', [$this, 'arrayIntersectFunc']),
+            new TwigFunction('array_diff', 'array_diff'),
             new TwigFunction('authorize', [$this, 'authorize']),
             new TwigFunction('debug', [$this, 'dump'], ['needs_context' => true, 'needs_environment' => true]),
             new TwigFunction('dump', [$this, 'dump'], ['needs_context' => true, 'needs_environment' => true]),