diff --git a/PackageSources/js-bundle/src/utils/TFDISBImport.ts b/PackageSources/js-bundle/src/utils/TFDISBImport.ts
index 3f91bf8..1003567 100644
--- a/PackageSources/js-bundle/src/utils/TFDISBImport.ts
+++ b/PackageSources/js-bundle/src/utils/TFDISBImport.ts
@@ -1,6 +1,27 @@
 import { SimBrief } from '../types/general';
 
-export const ImportFlightPlanKH = (plan: any, maxZFW: number, maxTOW: number, maxFuel: number, isImperial: boolean) => {
+type Plan = {
+  params: {
+    units: 'kgs' | 'lbs';
+  };
+  weights: {
+    est_zfw: number;
+    est_ramp: number;
+    pax_count_actual: number;
+    freight_added: number;
+  };
+  fuel: {
+    plan_ramp: number;
+  };
+};
+
+export const ImportFlightPlanKH = (
+  plan: Plan,
+  maxZFW: number,
+  maxTOW: number,
+  maxFuel: number,
+  isImperial: boolean
+) => {
   if (!plan) return { type: 'error', message: 'Empty plan' };
 
   let convFactor = 1;