diff --git a/package/src/index.d.ts b/package/src/index.d.ts
index 932beaa6..f4e77ea1 100644
--- a/package/src/index.d.ts
+++ b/package/src/index.d.ts
@@ -10,6 +10,7 @@ import {
 	ISelection,
 	IDOMTemplates,
 	IVisibility,
+	FormatDateString,
 } from './types';
 
 type Settings = {
diff --git a/tsconfig.json b/tsconfig.json
index dfd3a9df..efaa0e11 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,7 +4,6 @@
 		"outDir": "./build/",
 		"target": "ESNext",
 		"allowJs": true,
-		"skipLibCheck": true,
 		"esModuleInterop": true,
 		"allowSyntheticDefaultImports": true,
 		"strict": true,