diff --git a/.github/workflows/ci-workflow.yml b/.github/workflows/ci-workflow.yml
index 7b306db..fb96931 100644
--- a/.github/workflows/ci-workflow.yml
+++ b/.github/workflows/ci-workflow.yml
@@ -9,10 +9,10 @@ on:
 jobs:
   code-style:
     name: Code Style & Static Analysis
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
@@ -32,7 +32,7 @@ jobs:
 
   tests:
     name: Test Suite
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       max-parallel: 10
       matrix:
@@ -40,10 +40,14 @@ jobs:
           - 7.4
           - 8.0
           - 8.1
+          - 8.2
+          - 8.3
+          - 8.4
+          - 8.5
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
diff --git a/composer.json b/composer.json
index da1a2e8..2a8a859 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     },
     "require": {
         "php": ">=7.4",
-        "bentools/cartesian-product": "^1.1"
+        "bentools/cartesian-product": "^1.5|^2.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.0|^9.0",
diff --git a/src/StringCombinations.php b/src/StringCombinations.php
index 70d7d6b..b9c9728 100644
--- a/src/StringCombinations.php
+++ b/src/StringCombinations.php
@@ -2,7 +2,7 @@
 
 namespace BenTools\StringCombinations;
 
-use function BenTools\CartesianProduct\cartesian_product;
+use function BenTools\CartesianProduct\combinations;
 use Countable;
 use IteratorAggregate;
 use Traversable;
@@ -54,7 +54,7 @@ public function count(): int
     {
         if (null === $this->count) {
             $this->count = array_sum(array_map(function ($set) {
-                return count(cartesian_product($set));
+                return count(combinations($set));
             }, iterator_to_array($this->generateSets())));
         }
         return $this->count;
@@ -63,7 +63,7 @@ public function count(): int
     public function getIterator(): Traversable
     {
         foreach ($this->generateSets() as $set) {
-            foreach (cartesian_product($set) as $combination) {
+            foreach (combinations($set) as $combination) {
                 yield implode($this->glue, $combination);
             }
         }