diff --git a/public/scripts/slash-commands.js b/public/scripts/slash-commands.js
index a67aade2a..419ed81f3 100644
--- a/public/scripts/slash-commands.js
+++ b/public/scripts/slash-commands.js
@@ -2015,6 +2015,9 @@ async function echoCallback(args, value) {
         args.severity = null;
     }
 
+    // Make sure that the value is a string
+    value = String(value);
+
     const title = args.title ? args.title : undefined;
     const severity = args.severity ? args.severity : 'info';