diff --git a/lib/plugins/leetcode.js b/lib/plugins/leetcode.js
index e1da31e6..cc540ada 100644
--- a/lib/plugins/leetcode.js
+++ b/lib/plugins/leetcode.js
@@ -264,7 +264,11 @@ function formatResult(result) {
     x.expected_answer = result.expected_output;
     x.stdout = result.std_output;
   } else {
-    x.stdout = util.inspect((result.code_output || []).join('\n'));
+    let output = result.code_output || [];
+    if (Array.isArray(output)) {
+      output = output.join('\n');
+    }
+    x.stdout = util.inspect(output);
   }
 
   // make sure we pass eveything!
diff --git a/package-lock.json b/package-lock.json
index a6257580..3b484076 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "vsc-leetcode-cli",
-  "version": "2.6.9",
+  "version": "2.6.10",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index cd18c186..d26bb49c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vsc-leetcode-cli",
-  "version": "2.6.9",
+  "version": "2.6.10",
   "description": "A cli tool to enjoy leetcode!",
   "preferGlobal": "true",
   "engines": {