diff --git a/composer.json b/composer.json
index 1250677..38919cb 100644
--- a/composer.json
+++ b/composer.json
@@ -6,6 +6,7 @@
 	},
 	"require": {
 		"bcosca/fatfree-core": "^3.9",
-		"erusev/parsedown": "^1.7"
+		"erusev/parsedown": "^1.7",
+		"ezyang/htmlpurifier": "^4.18"
 	}
-}
\ No newline at end of file
+}