import {forceSimulation, forceLink, forceManyBody, forceCenter} from 'd3-force';
import {interpolateNumber} from 'd3-interpolate';
import {select, event as currentEvent} from 'd3-selection';
-import React, {Component, PropTypes} from 'react';
+import React, {Component} from 'react';
+import { PropTypes } from 'prop-types';
import {interval, now} from 'd3-timer';
import {zoom, zoomIdentity} from 'd3-zoom';
import NodeConstants from './NodeVisualElementConstants.js';