diff --git a/src/components/app/app.ts b/src/components/app/app.ts
index c87dd1f..a972e82 100644
--- a/src/components/app/app.ts
+++ b/src/components/app/app.ts
@@ -44,7 +44,7 @@ export interface Course
     grading:
     {
         method: string,
-        weightingMap: any
+        weightingMap: {[index: string]: number}
     }
 
     assignments: Grade[]