diff --git a/SlevomatCodingStandard/Sniffs/Classes/ForbiddenPublicPropertySniff.php b/SlevomatCodingStandard/Sniffs/Classes/ForbiddenPublicPropertySniff.php
index 58636062b..282a4104b 100644
--- a/SlevomatCodingStandard/Sniffs/Classes/ForbiddenPublicPropertySniff.php
+++ b/SlevomatCodingStandard/Sniffs/Classes/ForbiddenPublicPropertySniff.php
@@ -12,6 +12,8 @@
 use function array_merge;
 use const T_PRIVATE;
 use const T_PROTECTED;
+use const T_READONLY;
+use const T_SEMICOLON;
 use const T_VAR;
 use const T_VARIABLE;
 
@@ -20,6 +22,9 @@ final class ForbiddenPublicPropertySniff implements Sniff
 
 	public const CODE_FORBIDDEN_PUBLIC_PROPERTY = 'ForbiddenPublicProperty';
 
+	/** @var bool */
+	public $allowReadonly = false;
+
 	/** @var bool */
 	public $checkPromoted = false;
 
@@ -51,6 +56,10 @@ public function process(File $file, $variablePointer): void
 			return;
 		}
 
+		if ($this->allowReadonly && $this->isReadonlyProperty($file, $variablePointer)) {
+			return;
+		}
+
 		$errorMessage = 'Do not use public properties. Use method access instead.';
 		$file->addError($errorMessage, $variablePointer, self::CODE_FORBIDDEN_PUBLIC_PROPERTY);
 	}
@@ -74,4 +83,16 @@ private function getPropertyScopeModifier(File $file, int $position): array
 		return $file->getTokens()[$scopeModifierPosition];
 	}
 
+	private function isReadonlyProperty(File $file, int $position): bool
+	{
+		$readonlyPosition = TokenHelper::findPrevious($file, [T_READONLY], $position - 1);
+		if ($readonlyPosition === null) {
+			return false;
+		}
+
+		$semicolonPosition = TokenHelper::findNext($file, [T_SEMICOLON], $readonlyPosition + 1, $position - 1);
+
+		return $semicolonPosition === null;
+	}
+
 }