diff --git a/CHANGELOG.md b/CHANGELOG.md
index af17840..bd085ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # v2.10.0
 
 * Updated Autoprefixer to 9.1.
+* Add config for `grid`, `supports` and `flexbox` options.
 
 # v2.9.0
 
diff --git a/features/autoprefixer.feature b/features/autoprefixer.feature
index 0a5df3c..739b32a 100644
--- a/features/autoprefixer.feature
+++ b/features/autoprefixer.feature
@@ -48,8 +48,8 @@ Feature: Postprocessing stylesheets with Autoprefixer in different configuration
     Then I should see:
       """
         -webkit-box-sizing: border-box;
-        -moz-box-sizing: border-box;
-        box-sizing: border-box;
+           -moz-box-sizing: border-box;
+                box-sizing: border-box;
       """
 
   Scenario: Inline HTML