diff --git a/types/chartist/chartist-tests.ts b/types/chartist/chartist-tests.ts
index 863fdb33be..622e284436 100644
--- a/types/chartist/chartist-tests.ts
+++ b/types/chartist/chartist-tests.ts
@@ -535,3 +535,32 @@ new Chartist.Line('.ct-chart', {
         ]
     ]
 }, {})
+
+new Chartist.Line('.ct-chart', {
+    labels: [new Date(143134652600), new Date(143384652600)],
+    series: [
+        {
+          name: 'remaining',
+          data: [
+            { x: new Date(143134652600), y: 53 },
+            { x: new Date(143334652600), y: 40 },
+            { x: new Date(143354652600), y: 45 },
+            { x: new Date(143356652600), y: 41 },
+            { x: new Date(143366652600), y: 40 },
+            { x: new Date(143368652600), y: 38 },
+            { x: new Date(143378652600), y: 34 },
+            { x: new Date(143568652600), y: 32 },
+            { x: new Date(143569652600), y: 18 },
+            { x: new Date(143579652600), y: 11 }
+          ]
+        }, {
+          name: 'stories',
+          data: [
+            { x: new Date(143134652600), y: 53 },
+            { x: new Date(143334652600), y: 30 },
+            { x: new Date(143384652600), y: 30 },
+            { x: new Date(143568652600), y: 10 }
+          ]
+        }
+      ]
+}, {})
diff --git a/types/chartist/index.d.ts b/types/chartist/index.d.ts
index 86cc44667d..8437ee0272 100644
--- a/types/chartist/index.d.ts
+++ b/types/chartist/index.d.ts
@@ -99,7 +99,7 @@ declare namespace Chartist {
     interface IChartistSeriesData {
         name?: string;
         value?: number;
-        data?: Array<number>;
+        data?: Array<number> | Array<{ x: number | Date, y: number }>;
         className?: string;
         meta?: any;
     }