diff --git a/.gitattributes b/.gitattributes
index e6608e2..2d22c2b 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -16,6 +16,7 @@ phpstan.neon export-ignore
 phpunit.xml.dist export-ignore
 compose.yaml export-ignore
 Makefile export-ignore
+renovate.json export-ignore
 
 # Remove directories for archives
 .docker/ export-ignore
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e40c7f8..0cf3aea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,7 @@ on:
   push:
     branches:
       - master
+      - next
   workflow_dispatch:
 
 jobs:
diff --git a/README.md b/README.md
index d0b1ee3..1d2a9ae 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ var_dump($total->equals('0.3')); // bool(true)
 composer require php-collective/decimal-object
 ```
 
-Requires PHP 8.2+ and the `bcmath` extension. PHP 8.1 is covered by the 1.3 releases. For anything older, use the [legacy library](https://github.com/spryker/decimal-object).
+Requires PHP 8.2+ and the `bcmath` extension. The 1.x API is maintained in the 1.4 releases, see [Upgrading](https://php-collective.github.io/decimal-object/reference/upgrading) for the changes. PHP 8.1 is covered by the 1.3 releases. For anything older, use the [legacy library](https://github.com/spryker/decimal-object).
 
 ## Usage
 
diff --git a/composer.json b/composer.json
index c37719e..767f4fa 100644
--- a/composer.json
+++ b/composer.json
@@ -27,8 +27,7 @@
     },
     "require": {
         "php": ">=8.2",
-        "ext-bcmath": "*",
-        "ext-json": "*"
+        "ext-bcmath": "*"
     },
     "require-dev": {
         "php-collective/code-sniffer": "^0.6.8",
@@ -54,7 +53,8 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.x-dev"
+            "dev-master": "1.x-dev",
+            "dev-next": "2.x-dev"
         }
     },
     "scripts": {
diff --git a/tests/DecimalTest.php b/tests/DecimalTest.php
index 93b7a6b..b36b934 100644
--- a/tests/DecimalTest.php
+++ b/tests/DecimalTest.php
@@ -16,6 +16,7 @@
 use PhpCollective\DecimalObject\Decimal;
 use PhpCollective\DecimalObject\Exception\DecimalException;
 use PhpCollective\DecimalObject\Exception\DivisionByZeroException;
+use PhpCollective\DecimalObject\Exception\InvalidArgumentException as DecimalInvalidArgumentException;
 use PhpCollective\DecimalObject\Exception\InvalidNumberException;
 use PhpCollective\DecimalObject\Exception\NegativeNumberException;
 use PhpCollective\DecimalObject\Exception\OverflowException;
@@ -2495,4 +2496,18 @@ public function testNativeRoundingMode(): void
 
         $this->assertSame(count($cases), count(constant('RoundingMode::HalfEven')::cases()));
     }
+
+    /**
+     * The types list `float` so that PHP does not turn 2.5 into 2 for callers not using strict types.
+     *
+     * @return void
+     */
+    public function testFloatOperandsAreRejectedWithoutStrictTypes(): void
+    {
+        $result = require __DIR__ . '/data/float_operands.php';
+
+        $expected = DecimalInvalidArgumentException::class;
+
+        $this->assertSame(['mod' => $expected, 'pow' => $expected], $result);
+    }
 }
diff --git a/tests/data/float_operands.php b/tests/data/float_operands.php
new file mode 100644
index 0000000..d0842bb
--- /dev/null
+++ b/tests/data/float_operands.php
@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * MIT License
+ * For full license information, please view the LICENSE file that was distributed with this source code.
+ */
+
+// No strict_types on purpose: this is how a caller without it reaches the methods.
+
+use PhpCollective\DecimalObject\Decimal;
+
+$result = [];
+
+try {
+    $result['mod'] = (string)(new Decimal('7.0'))->mod(2.5);
+} catch (Throwable $e) {
+    $result['mod'] = $e::class;
+}
+
+try {
+    $result['pow'] = (string)(new Decimal('4'))->pow(2.0);
+} catch (Throwable $e) {
+    $result['pow'] = $e::class;
+}
+
+return $result;