diff --git a/src/Util/Regex.php b/src/Util/Regex.php
index 6ef04634..3545a766 100644
--- a/src/Util/Regex.php
+++ b/src/Util/Regex.php
@@ -58,7 +58,7 @@ private function toRegex(string $string): string
     public function addPatternModifier(string $modifier): void
     {
         /** @psalm-suppress InvalidLiteralArgument */
-        if ('' === $modifier || false === strpos(self::ALLOWED_MODIFIERS, $modifier)) {
+        if ('' === $modifier || !str_contains(self::ALLOWED_MODIFIERS, $modifier)) {
             throw new RuntimeException('Invalid regex modifier: '.$modifier);
         }
 
@@ -68,7 +68,7 @@ public function addPatternModifier(string $modifier): void
         $modifiers = $matches[0];
 
         // Skip if the modifier is already available
-        if (false !== strpos($modifiers, $modifier)) {
+        if (str_contains($modifiers, $modifier)) {
             return;
         }