diff --git a/CHANGELOG.md b/CHANGELOG.md
index f31a4a61..12fd4c3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,11 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ### Removed
 
 - Drop support for PHP < 7.2 (#420)
+- Final removal of Document::getAllSelectors (#557)
+- Final removal of Rule::setValues (#557)
+- Final removal of Rule::getValues (#557)
+- Final removal of DeclarationBlock::setSelector (#557)
+- Final removal of DeclarationBlock::getSelector (#557)
 
 ### Fixed
 
diff --git a/src/CSSList/Document.php b/src/CSSList/Document.php
index bad99831..917186b4 100644
--- a/src/CSSList/Document.php
+++ b/src/CSSList/Document.php
@@ -50,18 +50,6 @@ public function getAllDeclarationBlocks()
         return $aResult;
     }
 
-    /**
-     * Gets all `DeclarationBlock` objects recursively.
-     *
-     * @return array<int, DeclarationBlock>
-     *
-     * @deprecated will be removed in version 9.0; use `getAllDeclarationBlocks()` instead
-     */
-    public function getAllSelectors()
-    {
-        return $this->getAllDeclarationBlocks();
-    }
-
     /**
      * Returns all `RuleSet` objects recursively found in the tree, no matter how deeply nested the rule sets are.
      *
diff --git a/src/Rule/Rule.php b/src/Rule/Rule.php
index 2c56f7de..37ed89d3 100644
--- a/src/Rule/Rule.php
+++ b/src/Rule/Rule.php
@@ -189,79 +189,6 @@ public function setValue($mValue)
         $this->mValue = $mValue;
     }
 
-    /**
-     * @param array<array-key, array<array-key, RuleValueList>> $aSpaceSeparatedValues
-     *
-     * @return RuleValueList
-     *
-     * @deprecated will be removed in version 9.0
-     *             Old-Style 2-dimensional array given. Retained for (some) backwards-compatibility.
-     *             Use `setValue()` instead and wrap the value inside a RuleValueList if necessary.
-     */
-    public function setValues(array $aSpaceSeparatedValues)
-    {
-        $oSpaceSeparatedList = null;
-        if (count($aSpaceSeparatedValues) > 1) {
-            $oSpaceSeparatedList = new RuleValueList(' ', $this->iLineNo);
-        }
-        foreach ($aSpaceSeparatedValues as $aCommaSeparatedValues) {
-            $oCommaSeparatedList = null;
-            if (count($aCommaSeparatedValues) > 1) {
-                $oCommaSeparatedList = new RuleValueList(',', $this->iLineNo);
-            }
-            foreach ($aCommaSeparatedValues as $mValue) {
-                if (!$oSpaceSeparatedList && !$oCommaSeparatedList) {
-                    $this->mValue = $mValue;
-                    return $mValue;
-                }
-                if ($oCommaSeparatedList) {
-                    $oCommaSeparatedList->addListComponent($mValue);
-                } else {
-                    $oSpaceSeparatedList->addListComponent($mValue);
-                }
-            }
-            if (!$oSpaceSeparatedList) {
-                $this->mValue = $oCommaSeparatedList;
-                return $oCommaSeparatedList;
-            } else {
-                $oSpaceSeparatedList->addListComponent($oCommaSeparatedList);
-            }
-        }
-        $this->mValue = $oSpaceSeparatedList;
-        return $oSpaceSeparatedList;
-    }
-
-    /**
-     * @return array<int, array<int, RuleValueList>>
-     *
-     * @deprecated will be removed in version 9.0
-     *             Old-Style 2-dimensional array returned. Retained for (some) backwards-compatibility.
-     *             Use `getValue()` instead and check for the existence of a (nested set of) ValueList object(s).
-     */
-    public function getValues(): array
-    {
-        if (!$this->mValue instanceof RuleValueList) {
-            return [[$this->mValue]];
-        }
-        if ($this->mValue->getListSeparator() === ',') {
-            return [$this->mValue->getListComponents()];
-        }
-        $aResult = [];
-        foreach ($this->mValue->getListComponents() as $mValue) {
-            if (!$mValue instanceof RuleValueList || $mValue->getListSeparator() !== ',') {
-                $aResult[] = [$mValue];
-                continue;
-            }
-            if ($this->mValue->getListSeparator() === ' ' || count($aResult) === 0) {
-                $aResult[] = [];
-            }
-            foreach ($mValue->getListComponents() as $mValue) {
-                $aResult[count($aResult) - 1][] = $mValue;
-            }
-        }
-        return $aResult;
-    }
-
     /**
      * Adds a value to the existing value. Value will be appended if a `RuleValueList` exists of the given type.
      * Otherwise, the existing value will be wrapped by one.
diff --git a/src/RuleSet/DeclarationBlock.php b/src/RuleSet/DeclarationBlock.php
index 23716724..af900f79 100644
--- a/src/RuleSet/DeclarationBlock.php
+++ b/src/RuleSet/DeclarationBlock.php
@@ -146,29 +146,6 @@ public function removeSelector($mSelector)
         return false;
     }
 
-    /**
-     * @return array<int, Selector|string>
-     *
-     * @deprecated will be removed in version 9.0; use `getSelectors()` instead
-     */
-    public function getSelector()
-    {
-        return $this->getSelectors();
-    }
-
-    /**
-     * @param Selector|string $mSelector
-     * @param CSSList|null $oList
-     *
-     * @return void
-     *
-     * @deprecated will be removed in version 9.0; use `setSelectors()` instead
-     */
-    public function setSelector($mSelector, $oList = null)
-    {
-        $this->setSelectors($mSelector, $oList);
-    }
-
     /**
      * @return array<int, Selector|string>
      */
diff --git a/tests/ParserTest.php b/tests/ParserTest.php
index 91cd283c..06640910 100644
--- a/tests/ParserTest.php
+++ b/tests/ParserTest.php
@@ -182,8 +182,7 @@ public function unicodeParsing(): void
                 continue;
             }
             $aContentRules = $oRuleSet->getRules('content');
-            $aContents = $aContentRules[0]->getValues();
-            $sString = $aContents[0][0]->__toString();
+            $sString = $aContentRules[0]->getValue()->__toString();
             if ($sSelector == '.test-1') {
                 self::assertSame('" "', $sString);
             }