diff --git a/composer.json b/composer.json
index e39bc63..c65b702 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
   "require": {
     "php": "^8.3",
     "ext-json": "*",
-    "brick/math": "^0.12",
+    "brick/math": "^0.17",
     "psr/http-client": "^1.0",
     "psr/http-factory": "^1.1",
     "psr/http-message": "^1.1 || ^2.0"
diff --git a/composer.lock b/composer.lock
index 78c327f..4fc2247 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,29 +4,28 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "94f4767d77d28e0fc91f1404d6596ff0",
+    "content-hash": "95f3afd74682366ea35c09f90373c4d4",
     "packages": [
         {
             "name": "brick/math",
-            "version": "0.12.3",
+            "version": "0.17.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/brick/math.git",
-                "reference": "866551da34e9a618e64a819ee1e01c20d8a588ba"
+                "reference": "6aef71a9fbbd1ee7be0e313cd627f8e6f7125a5b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/brick/math/zipball/866551da34e9a618e64a819ee1e01c20d8a588ba",
-                "reference": "866551da34e9a618e64a819ee1e01c20d8a588ba",
+                "url": "https://api.github.com/repos/brick/math/zipball/6aef71a9fbbd1ee7be0e313cd627f8e6f7125a5b",
+                "reference": "6aef71a9fbbd1ee7be0e313cd627f8e6f7125a5b",
                 "shasum": ""
             },
             "require": {
-                "php": "^8.1"
+                "php": "^8.2"
             },
             "require-dev": {
-                "php-coveralls/php-coveralls": "^2.2",
-                "phpunit/phpunit": "^10.1",
-                "vimeo/psalm": "6.8.8"
+                "phpstan/phpstan": "2.1.22",
+                "phpunit/phpunit": "^11.5"
             },
             "type": "library",
             "autoload": {
@@ -56,7 +55,7 @@
             ],
             "support": {
                 "issues": "https://github.com/brick/math/issues",
-                "source": "https://github.com/brick/math/tree/0.12.3"
+                "source": "https://github.com/brick/math/tree/0.17.1"
             },
             "funding": [
                 {
@@ -64,7 +63,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2025-02-28T13:11:00+00:00"
+            "time": "2026-04-19T20:55:20+00:00"
         },
         {
             "name": "psr/http-client",
diff --git a/src/Drivers/BaseCurrencyDriver.php b/src/Drivers/BaseCurrencyDriver.php
index 1a8c32b..e60c242 100644
--- a/src/Drivers/BaseCurrencyDriver.php
+++ b/src/Drivers/BaseCurrencyDriver.php
@@ -200,7 +200,7 @@ public function convert(
         $response = $this->apiRequest('convert', $params);
 
         $rate = BigDecimal::of($this->responseString($response, 'result', static::class))
-          ->dividedBy(BigDecimal::of((string) $this->amount), ConversionResult::DEFAULT_SCALE, RoundingMode::HALF_UP);
+          ->dividedBy(BigDecimal::of((string) $this->amount), ConversionResult::DEFAULT_SCALE, RoundingMode::HalfUp);
 
         return new ConversionResult(
             $this->getBaseCurrency(),
diff --git a/src/Drivers/CurrencyApi.php b/src/Drivers/CurrencyApi.php
index e72dd0e..072a2bd 100644
--- a/src/Drivers/CurrencyApi.php
+++ b/src/Drivers/CurrencyApi.php
@@ -120,7 +120,7 @@ public function convert(
         }
 
         $rate = BigDecimal::of((string) $converted)
-          ->dividedBy(BigDecimal::of((string) $this->amount), ConversionResult::DEFAULT_SCALE, RoundingMode::HALF_UP);
+          ->dividedBy(BigDecimal::of((string) $this->amount), ConversionResult::DEFAULT_SCALE, RoundingMode::HalfUp);
 
         return new ConversionResult(
             $this->getBaseCurrency(),
diff --git a/src/Drivers/FastForex.php b/src/Drivers/FastForex.php
index c693aae..a55d10b 100644
--- a/src/Drivers/FastForex.php
+++ b/src/Drivers/FastForex.php
@@ -123,7 +123,7 @@ public function convert(
         }
 
         $rate = BigDecimal::of((string) $rates[$target])
-          ->dividedBy(BigDecimal::of((string) $this->amount), ConversionResult::DEFAULT_SCALE, RoundingMode::HALF_UP);
+          ->dividedBy(BigDecimal::of((string) $this->amount), ConversionResult::DEFAULT_SCALE, RoundingMode::HalfUp);
 
         return new ConversionResult(
             $this->optionalResponseString($response, 'base') ?? $this->getBaseCurrency(),
diff --git a/src/Results/ConversionResult.php b/src/Results/ConversionResult.php
index 2398f7d..2ea31c9 100644
--- a/src/Results/ConversionResult.php
+++ b/src/Results/ConversionResult.php
@@ -30,6 +30,7 @@ class ConversionResult
 
     /**
      * @param array<string, BigDecimal|float|int|string> $rates
+     * @param int<0, max>                                $scale
      *
      * @throws MathException If a rate value is not a valid numeric.
      */
@@ -86,7 +87,7 @@ public function setBaseCurrency(string|Currency $baseCurrency): self
 
         $rebased = [];
         foreach ($this->originalConversionRates as $currency => $rate) {
-            $rebased[$currency] = $rate->dividedBy($divisor, $this->scale, RoundingMode::HALF_UP);
+            $rebased[$currency] = $rate->dividedBy($divisor, $this->scale, RoundingMode::HalfUp);
         }
         $rebased[$code] = BigDecimal::one();
 
@@ -139,7 +140,7 @@ public function convert(
 
         return $this->toBigDecimal($amount)
           ->multipliedBy($this->originalConversionRates[$to])
-          ->dividedBy($this->originalConversionRates[$from], $this->scale, RoundingMode::HALF_UP);
+          ->dividedBy($this->originalConversionRates[$from], $this->scale, RoundingMode::HalfUp);
     }
 
     /**
@@ -168,6 +169,10 @@ public function allAsFloats(): array
      */
     private function toBigDecimal(BigDecimal|float|int|string $value): BigDecimal
     {
+        if (is_float($value)) {
+            return BigDecimal::of((string) $value);
+        }
+
         return $value instanceof BigDecimal ? $value : BigDecimal::of($value);
     }
 }