diff --git a/handlers/api-get/milestoneICS.js b/handlers/api-get/milestoneICS.js
index c4910b15..28c3b160 100644
--- a/handlers/api-get/milestoneICS.js
+++ b/handlers/api-get/milestoneICS.js
@@ -280,7 +280,7 @@ export default async function handler(request, response) {
             });
         }
     }
-    response.setHeader('Content-Disposition', `inline; filename=calendar.ics`);
+    response.setHeader('Content-Disposition', 'inline; filename=calendar.ics');
     response.setHeader('Content-Type', 'text/calendar; charset=utf-8');
     response.send(calendar.toString());
 }
diff --git a/handlers/api-get/milestoneICS.ts b/handlers/api-get/milestoneICS.ts
index d4ccfc75..9ab4d492 100644
--- a/handlers/api-get/milestoneICS.ts
+++ b/handlers/api-get/milestoneICS.ts
@@ -409,7 +409,7 @@ export default async function handler(
     }
   }
 
-  response.setHeader('Content-Disposition', `inline; filename=calendar.ics`)
+  response.setHeader('Content-Disposition', 'inline; filename=calendar.ics')
 
   response.setHeader('Content-Type', 'text/calendar; charset=utf-8')