diff --git a/src/CSSList/CSSList.php b/src/CSSList/CSSList.php
index f91ff68d..9ea81b4c 100644
--- a/src/CSSList/CSSList.php
+++ b/src/CSSList/CSSList.php
@@ -147,8 +147,6 @@ private static function parseListItem(ParserState $parserState, CSSList $oList)
     }
 
     /**
-     * @param ParserState $parserState
-     *
      * @return AtRuleBlockList|KeyFrame|Charset|CSSNamespace|Import|AtRuleSet|null
      *
      * @throws SourceException
diff --git a/src/CSSList/Document.php b/src/CSSList/Document.php
index 8d855409..490a9752 100644
--- a/src/CSSList/Document.php
+++ b/src/CSSList/Document.php
@@ -113,8 +113,6 @@ public function getSelectorsBySpecificity($sSpecificitySearch = null): array
 
     /**
      * Overrides `render()` to make format argument optional.
-     *
-     * @param OutputFormat|null $oOutputFormat
      */
     public function render(?OutputFormat $oOutputFormat = null): string
     {