diff --git a/src/Twig/Functions/IconExtension.php b/src/Twig/Functions/IconExtension.php
index 154a819..51e6d02 100644
--- a/src/Twig/Functions/IconExtension.php
+++ b/src/Twig/Functions/IconExtension.php
@@ -22,23 +22,16 @@ final class IconExtension extends AbstractExtension
 
     public function __construct(private array $directories, private array $palletes)
     {
-        if (empty($this->directories))
-            throw new \InvalidArgumentException('Directories array must contain at least one path!');
-
-        $dirsContainNonString = array_reduce($this->directories,
-            fn($notString, $path) => $notString || !is_string($path));
-
-        if ($dirsContainNonString)
-            throw new \TypeError('Directories array must only contain strings!');
-
-        if (empty($this->palletes))
+        if (empty($this->palletes)) {
             throw new \InvalidArgumentException('Palletes array must contain at least one pallet!');
+        }
 
         $palletesContainNonarray = array_reduce($this->palletes,
             fn($notArray, $path) => $notArray || !is_array($path));
 
-        if ($palletesContainNonarray)
+        if ($palletesContainNonarray) {
             throw new \TypeError('Palletes array must only contain arrays!');
+        }
 
         foreach ($this->palletes as $pallete) {
             if (!(
@@ -115,8 +108,9 @@ final class IconExtension extends AbstractExtension
     private function throwIfUnrecognisedOptionExists(array $options): void
     {
         foreach (array_keys($options) as $key) {
-            if (!key_exists($key, self::DEFAULT_OPTIONS))
+            if (!key_exists($key, self::DEFAULT_OPTIONS)) {
                 throw new \InvalidArgumentException("Unrecognised option '{$key}'!");
+            }
         }
     }
 
@@ -126,6 +120,7 @@ final class IconExtension extends AbstractExtension
         $rawSvgMarkup = $this->getSvgMarkup($iconFilepath);
         $cleanSvgMarkup = $this->removeExistingTitleElement($rawSvgMarkup);
         $cleanSvgMarkup = $this->removeBlackStrokeAttributes($cleanSvgMarkup);
+
         return $this->removeBlackFillAttributes($cleanSvgMarkup);
     }
 
@@ -134,8 +129,9 @@ final class IconExtension extends AbstractExtension
         foreach ($this->directories as $directory) {
             $potentialFilepath = sprintf('%s/%s.svg', $directory, $iconName);
 
-            if (file_exists($potentialFilepath))
+            if (file_exists($potentialFilepath)) {
                 return $potentialFilepath;
+            }
         }
 
         throw new IconNotFound(sprintf('File "%s.svg" not found in %s', $iconName, implode(', ', $this->directories)));
@@ -176,8 +172,9 @@ final class IconExtension extends AbstractExtension
 
     private function getPallete(string $palleteName): array
     {
-        if (array_key_exists($palleteName, $this->palletes))
+        if (array_key_exists($palleteName, $this->palletes)) {
             return $this->palletes[$palleteName];
+        }
 
         throw new PalleteNotFound("The pallete '$palleteName' was not found!");
     }
@@ -191,7 +188,10 @@ final class IconExtension extends AbstractExtension
 
     private function addTitleToSvgIfNotNull(string $svg, ?string $title): string
     {
-        if (null === $title) return $svg;
+        if (null === $title) {
+            return $svg;
+        }
+
         $this->throwIfTitleIsEmpty($title);
 
         return preg_replace('/(<svg(.|\n)*?>\n?)/', "$1<title>$title</title>", $svg);
@@ -215,8 +215,9 @@ final class IconExtension extends AbstractExtension
 
     private function throwIfTitleIsEmpty(string $title): void
     {
-        if ('' === $title)
+        if ('' === $title) {
             throw new \InvalidArgumentException('Title string must not be empty!');
+        }
     }
 
     private function setSvgHeightAndWidth(string $content, int $size): string
@@ -230,8 +231,9 @@ final class IconExtension extends AbstractExtension
 
     private function throwIfSizeIsNegative(int $size): void
     {
-        if ($size < 0)
+        if ($size < 0) {
             throw new \InvalidArgumentException('Size must not be negative');
+        }
     }
 }