diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9e17e58..f40b13a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Deprecated
 
+- Deprecate `DeclarationBlock::expandDimensionsShorthand()` (#571)
 - Deprecate `DeclarationBlock::expandBorderShorthand()` (#570)
 - Deprecate `DeclarationBlock::createShorthands()` (#569)
 - Deprecate `Document::expandShorthands()` (#566)
diff --git a/src/RuleSet/DeclarationBlock.php b/src/RuleSet/DeclarationBlock.php
index 6d60d212..4ae77ffe 100644
--- a/src/RuleSet/DeclarationBlock.php
+++ b/src/RuleSet/DeclarationBlock.php
@@ -257,6 +257,8 @@ public function expandBorderShorthand()
      * Handles `margin`, `padding`, `border-color`, `border-style` and `border-width`.
      *
      * @return void
+     *
+     * @deprecated This will be removed without substitution in version 10.0.
      */
     public function expandDimensionsShorthand()
     {