diff --git a/src/Symfony/Component/Yaml/Exception/ParseException.php b/src/Symfony/Component/Yaml/Exception/ParseException.php
index 95efe68fbb8a1..4854258ca4457 100644
--- a/src/Symfony/Component/Yaml/Exception/ParseException.php
+++ b/src/Symfony/Component/Yaml/Exception/ParseException.php
@@ -54,10 +54,8 @@ public function getSnippet()
 
     /**
      * Sets the snippet of code near the error.
-     *
-     * @param string $snippet The code snippet
      */
-    public function setSnippet($snippet)
+    public function setSnippet(string $snippet)
     {
         $this->snippet = $snippet;
 
@@ -78,10 +76,8 @@ public function getParsedFile()
 
     /**
      * Sets the filename where the error occurred.
-     *
-     * @param string $parsedFile The filename
      */
-    public function setParsedFile($parsedFile)
+    public function setParsedFile(string $parsedFile)
     {
         $this->parsedFile = $parsedFile;
 
@@ -100,10 +96,8 @@ public function getParsedLine()
 
     /**
      * Sets the line where the error occurred.
-     *
-     * @param int $parsedLine The file line
      */
-    public function setParsedLine($parsedLine)
+    public function setParsedLine(int $parsedLine)
     {
         $this->parsedLine = $parsedLine;
 
diff --git a/src/Symfony/Component/Yaml/Inline.php b/src/Symfony/Component/Yaml/Inline.php
index 4b12b9b11a9ba..f3f6761f818f6 100644
--- a/src/Symfony/Component/Yaml/Inline.php
+++ b/src/Symfony/Component/Yaml/Inline.php
@@ -34,12 +34,7 @@ class Inline
     private static $objectForMap = false;
     private static $constantSupport = false;
 
-    /**
-     * @param int         $flags
-     * @param int|null    $parsedLineNumber
-     * @param string|null $parsedFilename
-     */
-    public static function initialize($flags, $parsedLineNumber = null, $parsedFilename = null)
+    public static function initialize(int $flags, int $parsedLineNumber = null, string $parsedFilename = null)
     {
         self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
         self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);
@@ -704,7 +699,7 @@ public static function evaluateBinaryScalar(string $scalar): string
         return base64_decode($parsedBinaryData, true);
     }
 
-    private static function isBinaryString(string $value)
+    private static function isBinaryString(string $value): bool
     {
         return !preg_match('//u', $value) || preg_match('/[^\x00\x07-\x0d\x1B\x20-\xff]/', $value);
     }