diff --git a/composer.json b/composer.json
index 0927d4ddb500a727a0dd8dca8a9e92e5c2b5b3cf..95b0dd9d76503d4ccc571697eb54b1815b609308 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
     "keywords": [
         "shim"
     ],
-    "version": "v2.15.5",
+    "version": "v2.15.6",
     "license": [
         "MIT"
     ],
@@ -27,6 +27,7 @@
         "ext-tokenizer": "*"
     },
     "suggest": {
+        "ext-dom": "For handling output formats in XML",
         "ext-mbstring": "For handling non-UTF8 characters in cache signature."
     },
     "replace": {
diff --git a/php-cs-fixer b/php-cs-fixer
index 035fd5736c609308a0447255c81c023ad904562e..1f0d4683dafff7eb5e2233e046fe2a3857eaacea 100755
Binary files a/php-cs-fixer and b/php-cs-fixer differ
diff --git a/php-cs-fixer.asc b/php-cs-fixer.asc
index 2c74e44543bd6b7d3b399935b9f94761d77b2109..67a468fd8a3ea109b603188c4a9a85adcf0f00d6 100644
Binary files a/php-cs-fixer.asc and b/php-cs-fixer.asc differ