diff --git a/types/chart.js/index.d.ts b/types/chart.js/index.d.ts
index a465806797..f66a423a60 100644
--- a/types/chart.js/index.d.ts
+++ b/types/chart.js/index.d.ts
@@ -3,6 +3,7 @@
 // Definitions by: Alberto Nuti <https://github.com/anuti>
 //                 Fabien Lavocat <https://github.com/FabienLavocat>
 //                 KentarouTakeda <https://github.com/KentarouTakeda/>
+//                 Larry Bahr <https://github.com/larrybahr/>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
@@ -158,6 +159,8 @@ declare namespace Chart {
         animation?: ChartAnimationOptions;
         elements?: ChartElementsOptions;
         scales?: ChartScales;
+        showLines?: boolean;
+        spanGaps?: boolean;
         cutoutPercentage?: number;
         circumference?: number;
         rotation?: number;