diff --git a/CHANGELOG.md b/CHANGELOG.md
index fcab523..754229e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [Unreleased]
+
+### Changed
+
+- Requires PHP `8.5`
+
 ## 5.0.0 - 2026-02-07
 
 ### Changed
diff --git a/composer.json b/composer.json
index 416e600..68e9ac8 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "issues": "http://github.com/Innmind/Signals/issues"
     },
     "require": {
-        "php": "~8.4",
+        "php": "~8.5",
         "innmind/immutable": "~6.0"
     },
     "autoload": {
diff --git a/psalm.xml b/psalm.xml
index feccc34..510148d 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -14,7 +14,4 @@
             <directory name="vendor" />
         </ignoreFiles>
     </projectFiles>
-    <issueHandlers>
-        <UndefinedAttributeClass errorLevel="suppress" />
-    </issueHandlers>
 </psalm>