diff --git a/types/recharts/index.d.ts b/types/recharts/index.d.ts
index 172c38ed8d..7065bf0df9 100644
--- a/types/recharts/index.d.ts
+++ b/types/recharts/index.d.ts
@@ -552,6 +552,7 @@ export interface PolarAngleAxisProps extends EventAttributes, Partial<Presentati
     stroke?: string;
     orientation?: 'inner' | 'outer';
     tickFormatter?: TickFormatterFunction;
+    allowDuplicatedCategory?: boolean;
 }
 
 export class PolarAngleAxis extends React.Component<PolarAngleAxisProps> { }
@@ -592,6 +593,7 @@ export interface PolarRadiusAxisProps extends EventAttributes, Partial<Presentat
     domain?: Readonly<[PolarRadiusAxisDomain, PolarRadiusAxisDomain]>;
     scale?: ScaleType | RechartsFunction;
     allowDataOverflow?: boolean;
+    allowDuplicatedCategory?: boolean;
 }
 
 export class PolarRadiusAxis extends React.Component<PolarRadiusAxisProps> { }
@@ -1073,6 +1075,7 @@ export interface YAxisProps extends EventAttributes {
     reversed?: boolean;
     // see label section at http://recharts.org/#/en-US/api/YAxis
     label?: string | number | Label | LabelProps;
+    allowDuplicatedCategory?: boolean;
     stroke?: string;
 }
 
diff --git a/types/recharts/recharts-tests.tsx b/types/recharts/recharts-tests.tsx
index c2b8c67bd1..003ebdb2fe 100644
--- a/types/recharts/recharts-tests.tsx
+++ b/types/recharts/recharts-tests.tsx
@@ -5,7 +5,8 @@ import {
     CartesianGrid, Line, LineChart, PieChart, Pie,
     Sector, XAxis, YAxis, Tooltip, ReferenceLine,
     ReferenceArea, ResponsiveContainer, Label, LabelList, Brush,
-    ScatterChart, ZAxis, Legend, Scatter, Bar, BarChart, Text, Area, AreaChart, Customized
+    ScatterChart, ZAxis, Legend, Scatter, Bar, BarChart, Text, Area, AreaChart, Customized,
+    RadarChart, PolarGrid, PolarAngleAxis, PolarRadiusAxis, Radar
 } from 'recharts';
 
 interface ComponentState {
@@ -154,7 +155,7 @@ class Component extends React.Component<{}, ComponentState> {
                 <ResponsiveContainer height={300}>
                     <LineChart width={500} height={300} data={data}>
                         <XAxis dataKey="name" label={{ value: "X axis - name" }} />
-                        <YAxis label={{ value: "Y axis" }} />
+                        <YAxis label={{ value: "Y axis" }} allowDuplicatedCategory={false} />
                         <CartesianGrid stroke="#eee" strokeDasharray="5 5" />
                         <Line type="monotone" dataKey="uv" stroke="#8884d8" onClick={this.clickHandler} />
                         <Line type="monotone" dataKey="pv" stroke="#82ca9d" />
@@ -242,6 +243,12 @@ class Component extends React.Component<{}, ComponentState> {
                         <Area type="monotone" dataKey="pv" stroke="#82ca9d" fillOpacity={1} fill="url(#colorPv)" />
                     </AreaChart>
                 </ResponsiveContainer>
+                <RadarChart cx={300} cy={250} outerRadius={150} width={500} height={500} data={data}>
+                    <PolarGrid />
+                    <PolarAngleAxis dataKey="subject" allowDuplicatedCategory={false} />
+                    <PolarRadiusAxis allowDuplicatedCategory={true} />
+                    <Radar name="Mike" dataKey="A" stroke="#8884d8" fill="#8884d8" fillOpacity={0.6} />
+                </RadarChart>
             </div>
         );
     }