diff --git a/types/chart.js/chart.js-tests.ts b/types/chart.js/chart.js-tests.ts
index b9ffd7a8f6..5c2dab60f9 100644
--- a/types/chart.js/chart.js-tests.ts
+++ b/types/chart.js/chart.js-tests.ts
@@ -18,11 +18,36 @@ let chart: Chart = new Chart(new CanvasRenderingContext2D(), {
         ]
     },
     options: {
+        hover: {
+            intersect: true
+        },
+        tooltips: {
+            filter: data => Number(data.yLabel) > 0,
+            intersect: true,
+            itemSort: (a, b) => Math.random() - 0.5,
+            position: "average",
+            caretPadding: 2,
+            displayColors: true,
+            borderColor: "rgba(0,0,0,0)",
+            borderWidth: 1,
+        },
         scales: {
             xAxes: [{
+                ticks: {
+                    callback: Math.floor
+                },
                 gridLines: { display: false }
             }]
         }
     }
 });
 chart.update();
+
+console.log(chart.ctx && chart.ctx.font);
+console.log(chart.canvas && chart.canvas.tagName);
+if (chart.chartArea) {
+    console.log(chart.chartArea.top);
+    console.log(chart.chartArea.right);
+    console.log(chart.chartArea.bottom);
+    console.log(chart.chartArea.left);
+}
diff --git a/types/chart.js/index.d.ts b/types/chart.js/index.d.ts
index 63c30a739b..f1a39c84c4 100644
--- a/types/chart.js/index.d.ts
+++ b/types/chart.js/index.d.ts
@@ -1,7 +1,8 @@
-// Type definitions for Chart.js 2.4
+// Type definitions for Chart.js 2.6
 // Project: https://github.com/nnnick/Chart.js
 // Definitions by: Alberto Nuti <https://github.com/anuti>
 //                 Fabien Lavocat <https://github.com/FabienLavocat>
+//                 KentarouTakeda <https://github.com/KentarouTakeda/>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
@@ -26,6 +27,9 @@ declare class Chart {
     getElementAtEvent: (e: any) => {};
     getElementsAtEvent: (e: any) => Array<{}>;
     getDatasetAtEvent: (e: any) => Array<{}>;
+    ctx: CanvasRenderingContext2D|null;
+    canvas: HTMLCanvasElement|null;
+    chartArea: Chart.ChartArea;
     static pluginService: PluginServiceStatic;
 
     static defaults: {
@@ -80,6 +84,13 @@ declare namespace Chart {
 
     type PositionType = 'left' | 'right' | 'top' | 'bottom';
 
+    interface ChartArea {
+        top: number;
+        right: number;
+        bottom: number;
+        left: number;
+    }
+
     interface ChartLegendItem {
         text?: string;
         fillStyle?: string;
@@ -191,6 +202,7 @@ declare namespace Chart {
         enabled?: boolean;
         custom?(a: any): void;
         mode?: string;
+        intersect?: boolean;
         backgroundColor?: ChartColor;
         titleFontFamily?: string;
         titleFontSize?: number;
@@ -215,11 +227,19 @@ declare namespace Chart {
         cornerRadius?: number;
         multiKeyBackground?: string;
         callbacks?: ChartTooltipCallback;
+        filter?(item: ChartTooltipItem): boolean;
+        itemSort?(itemA: ChartTooltipItem, itemB: ChartTooltipItem): number;
+        position?: "average"|"nearest";
+        caretPadding?: number;
+        displayColors?: boolean;
+        borderColor?: ChartColor;
+        borderWidth?: number;
     }
 
     interface ChartHoverOptions {
         mode?: string;
         animationDuration?: number;
+        intersect?: boolean;
         onHover?(active: any): void;
     }
 
@@ -307,7 +327,7 @@ declare namespace Chart {
 
     interface TickOptions {
         autoSkip?: boolean;
-        callback?(value: any, index: any, values: any): string;
+        callback?(value: any, index: any, values: any): string|number;
         display?: boolean;
         fontColor?: ChartColor;
         fontFamily?: string;
diff --git a/types/chart.js/tsconfig.json b/types/chart.js/tsconfig.json
index a798d69e23..aae63d6394 100644
--- a/types/chart.js/tsconfig.json
+++ b/types/chart.js/tsconfig.json
@@ -7,7 +7,7 @@
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
-        "strictNullChecks": false,
+        "strictNullChecks": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"