diff --git a/src/Tokenizer/Parser/Boundary.php b/src/Tokenizer/Parser/Boundary.php
index f3c1a31..a61f291 100644
--- a/src/Tokenizer/Parser/Boundary.php
+++ b/src/Tokenizer/Parser/Boundary.php
@@ -21,7 +21,7 @@ final class Boundary
     /**
      * @param       string $string
      * @param array        $matches
-     * @param              $regexBoundaries
+     * @param              string $regexBoundaries
      *
      * @return bool
      */
diff --git a/src/Tokenizer/Parser/Numeral.php b/src/Tokenizer/Parser/Numeral.php
index 4602e6c..88ca8b2 100644
--- a/src/Tokenizer/Parser/Numeral.php
+++ b/src/Tokenizer/Parser/Numeral.php
@@ -21,7 +21,7 @@ final class Numeral
     /**
      * @param       string $string
      * @param array        $matches
-     * @param              $regexBoundaries
+     * @param              string $regexBoundaries
      *
      * @return bool
      */
diff --git a/src/Tokenizer/Parser/Reserved.php b/src/Tokenizer/Parser/Reserved.php
index fc94b0b..8028e7b 100644
--- a/src/Tokenizer/Parser/Reserved.php
+++ b/src/Tokenizer/Parser/Reserved.php
@@ -33,8 +33,8 @@ public static function isReservedPrecededByDotCharacter($previous)
     /**
      * @param       string $string
      * @param array        $matches
-     * @param              $regexReservedTopLevel
-     * @param              $regexBoundaries
+     * @param              string $regexReservedTopLevel
+     * @param              string $regexBoundaries
      *
      * @return bool
      */
@@ -64,8 +64,8 @@ public static function getReservedTopLevelString($string, array &$matches)
     /**
      * @param string $string
      * @param        $matches
-     * @param        $regexReservedNewLine
-     * @param        $regexBoundaries
+     * @param        string $regexReservedNewLine
+     * @param        string $regexBoundaries
      *
      * @return bool
      */
@@ -97,8 +97,8 @@ public static function getReservedNewLineString($string, array &$matches)
     /**
      * @param       string $upper
      * @param array        $matches
-     * @param              $regexReserved
-     * @param              $regexBoundaries
+     * @param              string $regexReserved
+     * @param              string $regexBoundaries
      *
      * @return bool
      */
diff --git a/src/Tokenizer/Parser/String.php b/src/Tokenizer/Parser/String.php
index b3cc7a0..4faf4f6 100644
--- a/src/Tokenizer/Parser/String.php
+++ b/src/Tokenizer/Parser/String.php
@@ -24,7 +24,7 @@ final class String
      *
      * @param   string $string
      * @param array    $matches
-     * @param          $regexFunction
+     * @param          string $regexFunction
      *
      * @return bool
      */
@@ -49,7 +49,7 @@ public static function getFunctionString($string, array &$matches)
 
     /**
      * @param string $string
-     * @param        $regexBoundaries
+     * @param        string $regexBoundaries
      *
      * @return array
      */