diff --git a/src/FilterIterableAggregate.php b/src/FilterIterableAggregate.php
index f74c521..189b10b 100644
--- a/src/FilterIterableAggregate.php
+++ b/src/FilterIterableAggregate.php
@@ -21,18 +21,12 @@
  */
 final class FilterIterableAggregate implements IteratorAggregate
 {
-    /**
-     * @var Closure(T, TKey, iterable<TKey, T>): bool
-     */
-    private Closure $predicate;
-
     /**
      * @param iterable<TKey, T> $iterable
      * @param (Closure(T, TKey, iterable<TKey, T>): bool) $predicate
      */
-    public function __construct(private iterable $iterable, Closure $predicate)
+    public function __construct(private iterable $iterable, private Closure $predicate)
     {
-        $this->predicate = $predicate;
     }
 
     /**
diff --git a/src/MapIterableAggregate.php b/src/MapIterableAggregate.php
index 323da8e..e91725a 100644
--- a/src/MapIterableAggregate.php
+++ b/src/MapIterableAggregate.php
@@ -22,18 +22,12 @@
  */
 final class MapIterableAggregate implements IteratorAggregate
 {
-    /**
-     * @var Closure(T, TKey, iterable<TKey, T>): W
-     */
-    private Closure $closure;
-
     /**
      * @param iterable<TKey, T> $iterable
      * @param (Closure(T, TKey, iterable<TKey, T>): W) $closure
      */
-    public function __construct(private iterable $iterable, Closure $closure)
+    public function __construct(private iterable $iterable, private Closure $closure)
     {
-        $this->closure = $closure;
     }
 
     /**
diff --git a/src/MersenneTwisterRNGIteratorAggregate.php b/src/MersenneTwisterRNGIteratorAggregate.php
index 31efebb..93adbee 100644
--- a/src/MersenneTwisterRNGIteratorAggregate.php
+++ b/src/MersenneTwisterRNGIteratorAggregate.php
@@ -37,7 +37,7 @@ public function getIterator(): Generator
 
         // @phpstan-ignore-next-line
         while (true) {
-            yield mt_rand($this->min, $this->max);
+            yield random_int($this->min, $this->max);
         }
     }
 
diff --git a/src/ReduceIterableAggregate.php b/src/ReduceIterableAggregate.php
index 6759747..419392d 100644
--- a/src/ReduceIterableAggregate.php
+++ b/src/ReduceIterableAggregate.php
@@ -22,19 +22,13 @@
  */
 final class ReduceIterableAggregate implements IteratorAggregate
 {
-    /**
-     * @var Closure(W, T, TKey, iterable<TKey, T>): W
-     */
-    private Closure $closure;
-
     /**
      * @param iterable<TKey, T> $iterable
      * @param (Closure(W, T, TKey, iterable<TKey, T>): W) $closure
      * @param W $initial
      */
-    public function __construct(private iterable $iterable, Closure $closure, private mixed $initial)
+    public function __construct(private iterable $iterable, private Closure $closure, private mixed $initial)
     {
-        $this->closure = $closure;
     }
 
     /**
diff --git a/src/ReductionIterableAggregate.php b/src/ReductionIterableAggregate.php
index 47139a9..919010f 100644
--- a/src/ReductionIterableAggregate.php
+++ b/src/ReductionIterableAggregate.php
@@ -22,19 +22,13 @@
  */
 final class ReductionIterableAggregate implements IteratorAggregate
 {
-    /**
-     * @var Closure(W, T, TKey, iterable<TKey, T>): W
-     */
-    private Closure $closure;
-
     /**
      * @param iterable<TKey, T> $iterable
      * @param (Closure(W, T, TKey, iterable<TKey, T>): W) $closure
      * @param W $initial
      */
-    public function __construct(private iterable $iterable, Closure $closure, private mixed $initial)
+    public function __construct(private iterable $iterable, private Closure $closure, private mixed $initial)
     {
-        $this->closure = $closure;
     }
 
     /**