diff --git a/lib/structures/CalendarEvent.ts b/lib/structures/CalendarEvent.ts
index 00819e9..d248422 100644
--- a/lib/structures/CalendarEvent.ts
+++ b/lib/structures/CalendarEvent.ts
@@ -77,7 +77,7 @@ export class CalendarEvent extends Base<number> {
         this.color = data.color ?? null;
         this.rsvpLimit = data.rsvpLimit ?? null;
         this.startsAt = data.startsAt ? new Date(data.startsAt) : null;
-        this.duration = (data.duration as number) * 60000 ?? null; // in ms.
+        this.duration = data.duration ? data.duration * 60000 : null; // in ms.
         this.isPrivate = data.isPrivate ?? false;
         this.mentions = data.mentions ?? null;
         this.createdAt = data.createdAt ? new Date(data.createdAt) : null;
diff --git a/tsconfig.json b/tsconfig.json
index 4def560..1f4060e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -24,7 +24,7 @@
       "moduleResolution": "node",
       "allowUnusedLabels": false,
       "allowUnreachableCode": false,
-      "importsNotUsedAsValues": "error",
+      "verbatimModuleSyntax": true,
       "ignoreDeprecations": "5.0",
       "checkJs": true,
       "strictPropertyInitialization": true,