diff --git a/types/d3-graphviz/index.d.ts b/types/d3-graphviz/index.d.ts
index f4904a8829..c8eb54c06a 100644
--- a/types/d3-graphviz/index.d.ts
+++ b/types/d3-graphviz/index.d.ts
@@ -6,101 +6,101 @@
 
 declare module 'd3-graphviz' {
 
-import { ZoomBehavior } from 'd3-zoom'
-import { Selection } from 'd3-selection'
+    import { ZoomBehavior } from 'd3-zoom'
+    import { Selection } from 'd3-selection'
 
-module 'd3-selection' {
-    interface Selection<GElement extends BaseType, Datum, PElement extends BaseType, PDatum> {
-        graphviz(options?: IGraphvizOptions | boolean): IGraphviz;
-        selectWithoutDataPropagation(): Selection<GElement, Datum, PElement, PDatum>;
+    module 'd3-selection' {
+        interface Selection<GElement extends BaseType, Datum, PElement extends BaseType, PDatum> {
+            graphviz(options?: IGraphvizOptions | boolean): IGraphviz;
+            selectWithoutDataPropagation(): Selection<GElement, Datum, PElement, PDatum>;
+        }
+    }
+
+    /**
+     * 
+     * @param selector 
+     * @param options 
+     */
+    export function graphviz(selector: string, options?: IGraphvizOptions | boolean): IGraphviz;
+
+    export interface IGraphvizOptions {
+        useWorker?: boolean,
+        engine?: string,
+        totalMemory?: number,
+        keyMode?: string,
+        fade?: boolean,
+        tweenPaths?: boolean,
+        tweenShapes?: boolean,
+        convertEqualSidedPolygons?: boolean,
+        tweenPrecision?: number,
+        growEnteringEdges?: boolean,
+        zoom?: boolean,
+        zoomScaleExtent?: number[],
+        zoomTranslateExtent?: number[][],
+        width?: number,
+        height?: number,
+        scale?: number,
+        fit?: boolean,
+    }
+
+    export interface IDotAttributes {
+        style: any;
+        URL: any;
+        tooltip: any;
+    }
+
+    export interface IEdgeOptions {
+        shortening: number;
+    }
+
+    export interface INodeOptions {
+
+    }
+
+    export interface IGraphviz {
+        engine(engine: string): IGraphviz; //engine should be an enum
+        addImage(path: string, width: number, height: number): IGraphviz; //Width & height can be strings, i.e. '100px'
+        totalMemory(size: number): IGraphviz;
+        keyMode(keyMode: string): IGraphviz; //keyMode should be an enum
+        fade(enable: boolean): IGraphviz;
+        tweenPaths(enable: boolean): IGraphviz;
+        tweenShapes(enable: boolean): IGraphviz;
+        convertEqualSidedPolygons(enable: boolean): IGraphviz;
+        tweenPrecision(precision: number): IGraphviz; //precision can be a string, i.e. '50%'
+        growEnteringEdges(enable: boolean): IGraphviz;
+        zoom(enable: boolean): IGraphviz;
+        resetZoom(transition?: any): any;
+        zoomBehavior(): ZoomBehavior<any, any> | null;
+        zoomSelection(): any | null;
+        zoomScaleExtent(extent?: number[]): IGraphviz;
+        zoomTranslateExtent(extent?: number[][]): IGraphviz;
+        render(callback?: Function): IGraphviz;
+        dot(src: any, callback?: () => void): IGraphviz;
+        data(): any;
+        renderDot(src: string, callback?: any): IGraphviz;
+        transition(name: any): IGraphviz;
+        active(name?: any): any; //Returns a transition, what type?
+        options(): IGraphvizOptions;
+        options(options: IGraphvizOptions): IGraphviz;
+        width(width: number): IGraphviz;
+        height(height: number): IGraphviz;
+        scale(scale: number): IGraphviz;
+        fit(fit: boolean): IGraphviz;
+        attributer(callback: Function | null): IGraphviz;
+        on(typenames: string, callback?: () => void): any;
+        onerror(callback: any): any;
+        logEvents(enable: boolean): IGraphviz;
+        drawEdge(x1: number, x2: number, y1: number, y2: number, attributes?: IDotAttributes, options?: IEdgeOptions): IGraphviz;
+        updateDrawnEdge(x1: number, x2: number, y1: number, y2: number, attributes?: IDotAttributes, options?: IEdgeOptions): IGraphviz;
+        moveDrawnEdgeEndPoint(x2: number, y2: number, options?: IEdgeOptions): IGraphviz;
+        insertDrawnEdge(name: string): IGraphviz;
+        removeDrawnEdge(): IGraphviz;
+        drawnEdgeSelection(): any;
+        drawNode(x: number, y: number, nodeId: string, attributes?: IDotAttributes, options?: INodeOptions): IGraphviz;
+        updateDrawnNode(x: number, y: number, nodeId: string, attributes?: IDotAttributes, options?: INodeOptions): IGraphviz;
+        moveDrawnNode(x: number, y: number, options?: INodeOptions): IGraphviz;
+        inserDrawnNode(nodeId: string): IGraphviz;
+        removeDrawnNode(): IGraphviz;
+        drawnNodeSelection(): Selection<any, any, HTMLElement, any>;
     }
 }
-
-/**
- * 
- * @param selector 
- * @param options 
- */
-export function graphviz(selector: string, options?: IGraphvizOptions | boolean): IGraphviz;
-
-export interface IGraphvizOptions {
-    useWorker?: boolean,
-    engine?: string,
-    totalMemory?: number,
-    keyMode?: string,
-    fade?: boolean,
-    tweenPaths?: boolean,
-    tweenShapes?: boolean,
-    convertEqualSidedPolygons?: boolean,
-    tweenPrecision?: number,
-    growEnteringEdges?: boolean,
-    zoom?: boolean,
-    zoomScaleExtent?: number[],
-    zoomTranslateExtent?: number[][],
-    width?: number,
-    height?: number,
-    scale?: number,
-    fit?: boolean,
-}
-
-export interface IDotAttributes {
-    style: any;
-    URL: any;
-    tooltip: any;
-}
-
-export interface IEdgeOptions {
-    shortening: number;
-}
-
-export interface INodeOptions {
-
-}
-
-export interface IGraphviz {
-    engine(engine: string): IGraphviz; //engine should be an enum
-    addImage(path: string, width: number, height: number): IGraphviz; //Width & height can be strings, i.e. '100px'
-    totalMemory(size: number): IGraphviz;
-    keyMode(keyMode: string): IGraphviz; //keyMode should be an enum
-    fade(enable: boolean): IGraphviz;
-    tweenPaths(enable: boolean): IGraphviz;
-    tweenShapes(enable: boolean): IGraphviz;
-    convertEqualSidedPolygons(enable: boolean): IGraphviz;
-    tweenPrecision(precision: number): IGraphviz; //precision can be a string, i.e. '50%'
-    growEnteringEdges(enable: boolean): IGraphviz;
-    zoom(enable: boolean): IGraphviz;
-    resetZoom(transition?: any): any;
-    zoomBehavior(): ZoomBehavior<any, any> | null;
-    zoomSelection(): any | null;
-    zoomScaleExtent(extent?: number[]): IGraphviz;
-    zoomTranslateExtent(extent?: number[][]): IGraphviz;
-    render(callback?: Function): IGraphviz;
-    dot(src: any, callback?: () => void): IGraphviz;
-    data(): any;
-    renderDot(src: string, callback?: any): IGraphviz;
-    transition(name: any): IGraphviz;
-    active(name?: any): any; //Returns a transition, what type?
-    options(): IGraphvizOptions;
-    options(options: IGraphvizOptions): IGraphviz;
-    width(width: number): IGraphviz;
-    height(height: number): IGraphviz;
-    scale(scale: number): IGraphviz;
-    fit(fit: boolean): IGraphviz;
-    attributer(callback: Function | null): IGraphviz;
-    on(typenames: string, callback?: () => void): any;
-    onerror(callback: any): any;
-    logEvents(enable: boolean): IGraphviz;
-    drawEdge(x1: number, x2: number, y1: number, y2: number, attributes?: IDotAttributes, options?: IEdgeOptions): IGraphviz;
-    updateDrawnEdge(x1: number, x2: number, y1: number, y2: number, attributes?: IDotAttributes, options?: IEdgeOptions): IGraphviz;
-    moveDrawnEdgeEndPoint(x2: number, y2: number, options?: IEdgeOptions): IGraphviz;
-    insertDrawnEdge(name: string): IGraphviz;
-    removeDrawnEdge(): IGraphviz;
-    drawnEdgeSelection(): any;
-    drawNode(x: number, y: number, nodeId: string, attributes?: IDotAttributes, options?: INodeOptions): IGraphviz;
-    updateDrawnNode(x: number, y: number, nodeId: string, attributes?: IDotAttributes, options?: INodeOptions): IGraphviz;
-    moveDrawnNode(x: number, y: number, options?: INodeOptions): IGraphviz;
-    inserDrawnNode(nodeId: string): IGraphviz;
-    removeDrawnNode(): IGraphviz;
-    drawnNodeSelection(): Selection<any, any, HTMLElement, any>;
-}
-}