diff --git a/CHANGELOG.md b/CHANGELOG.md
index f262a46..f7a8d4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [Unreleased]
+
+### Changed
+
+- Requires PHP `8.5`
+
 ## 6.2.0 - 2026-05-14
 
 ### Changed
diff --git a/composer.json b/composer.json
index 234304b..bd5f091 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "issues": "http://github.com/Innmind/Immutable/issues"
     },
     "require": {
-        "php": "~8.4"
+        "php": "~8.5"
     },
     "autoload": {
         "psr-4": {
diff --git a/psalm.xml b/psalm.xml
index a2dbf3d..78df975 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -17,7 +17,4 @@
     <disableExtensions>
         <extension name="random" />
     </disableExtensions>
-    <issueHandlers>
-        <UndefinedAttributeClass errorLevel="suppress" />
-    </issueHandlers>
 </psalm>