diff --git a/controllers/convert.js b/controllers/convert.js
index 329071f..d058665 100644
--- a/controllers/convert.js
+++ b/controllers/convert.js
@@ -82,7 +82,11 @@ export const convert = async (req, res) => {
 					res
 						.status(400)
 						.send(
-							`This conversion module does not support mimetype: "${mimetype}". Supported mimetypes: ${moduleObject.from}`
+							`This conversion module does not support mimetype: "${mimetype}". Supported mimetypes: ${
+								moduleObject.from instanceof Array
+									? `[${moduleObject.from.join(", ")}]`
+									: moduleObject.from
+							}`
 						)
 				);
 
diff --git a/package.json b/package.json
index 5b207e2..380b2b2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@nottimtam/file-converter",
-	"version": "1.2.12",
+	"version": "1.2.13",
 	"description": "A headless, self-hostable, open-source file conversion express middleware.",
 	"main": "index.js",
 	"type": "module",