diff --git a/types/papaparse/index.d.ts b/types/papaparse/index.d.ts
index df09dde329..300e33b4a5 100644
--- a/types/papaparse/index.d.ts
+++ b/types/papaparse/index.d.ts
@@ -97,7 +97,7 @@ export interface ParseConfig {
     quoteChar?: string;            // default: '"'
     header?: boolean;              // default: false
     trimHeaders?: boolean;         // default: false
-    dynamicTyping?: boolean | { [key: string]: boolean; [index: number]: boolean;} | ((field: string) => boolean); // default: false
+    dynamicTyping?: boolean | { [headerName: string]: boolean; [columnNumber: number]: boolean;} | ((field: string | number) => boolean); // default: false
     preview?: number;              // default: 0
     encoding?: string;             // default: ""
     worker?: boolean;              // default: false