diff --git a/composer.json b/composer.json
index e4556e4..a7d9ed5 100644
--- a/composer.json
+++ b/composer.json
@@ -20,6 +20,6 @@
   },
   "require": {
     "php": "^7.2",
-    "symfony/config": "^4.0"
+    "symfony/config": "^3.4||^4.0"
   }
 }
diff --git a/ext_emconf.php b/ext_emconf.php
index 9553469..5729430 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -14,6 +14,7 @@
     'constraints' => [
         'depends' => [
             'php' => '7.2.2-7.99.99',
+            'fluid_styled_content' => '8.7.13- 8.7.99',
             'typo3' => '8.7.10-8.99.99'
         ]
     ],