diff --git a/packages/esign/src/types.ts b/packages/esign/src/types.ts
index 565c96d1b0..a7da617caa 100644
--- a/packages/esign/src/types.ts
+++ b/packages/esign/src/types.ts
@@ -56,8 +56,8 @@ export interface SubmitConfig {
   component?: React.ComponentType<SubmitButtonProps>;
 }
 
-export interface PdfModuleConfig {
-  pdfLib: any;
+export interface PdfModuleConfig extends Record<string, unknown> {
+  pdfLib: object;
   workerSrc?: string;
   setWorker?: boolean;
   textLayer?: boolean;