diff --git a/composer.json b/composer.json
index 0ec520e..7c1df43 100644
--- a/composer.json
+++ b/composer.json
@@ -54,7 +54,7 @@
         "rector/rector": "^2.0.7",
         "roave/infection-static-analysis-plugin": "^1.35",
         "spatie/phpunit-watcher": "^1.24",
-        "vimeo/psalm": "^5.26.1|^6.2",
+        "vimeo/psalm": "^5.26.1 || ^6.9.1",
         "yiisoft/di": "^1.3",
         "yiisoft/test-support": "^3.0.1"
     },
@@ -83,7 +83,6 @@
     },
     "config": {
         "sort-packages": true,
-        "bump-after-update": "dev",
         "allow-plugins": {
             "bamarni/composer-bin-plugin": true,
             "composer/package-versions-deprecated": true,
diff --git a/psalm.xml b/psalm.xml
index b48c894..39a3bda 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -3,6 +3,8 @@
     errorLevel="1"
     findUnusedBaselineEntry="true"
     findUnusedCode="false"
+    ensureOverrideAttribute="false"
+    strictBinaryOperands="false"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
diff --git a/src/Exception/ErrorException.php b/src/Exception/ErrorException.php
index 11c1465..0346c26 100644
--- a/src/Exception/ErrorException.php
+++ b/src/Exception/ErrorException.php
@@ -15,12 +15,12 @@
 /**
  * `ErrorException` represents a PHP error.
  * @psalm-type DebugBacktraceType = list<array{args?:list<mixed>,class?:class-string,file?:string,function:string,line?:int,object?:object,type?:string}>
+ *
+ * @final
  */
 class ErrorException extends \ErrorException implements FriendlyExceptionInterface
 {
-    /**
-     * @psalm-suppress MissingClassConstType Private constants never change.
-     */
+    /** @psalm-suppress MissingClassConstType Private constants never change. */
     private const ERROR_NAMES = [
         E_ERROR => 'PHP Fatal Error',
         E_WARNING => 'PHP Warning',
diff --git a/src/Exception/UserException.php b/src/Exception/UserException.php
index 7366979..b6ded57 100644
--- a/src/Exception/UserException.php
+++ b/src/Exception/UserException.php
@@ -9,6 +9,8 @@
 /**
  * UserException is the base class for exceptions that are meant to be shown to end users.
  * Such exceptions are often caused by mistakes of end users.
+ *
+ * @final
  */
 class UserException extends Exception
 {
diff --git a/tools/composer-require-checker/composer.json b/tools/composer-require-checker/composer.json
index 35b552f..0992a90 100644
--- a/tools/composer-require-checker/composer.json
+++ b/tools/composer-require-checker/composer.json
@@ -1,8 +1,5 @@
 {
     "require-dev": {
         "maglnet/composer-require-checker": "^4.7.1"
-    },
-    "config": {
-        "bump-after-update": "dev"
     }
 }