diff --git a/README.md b/README.md
index d762a5a..e193383 100644
--- a/README.md
+++ b/README.md
@@ -44,11 +44,11 @@ Turf.js | GeoJSONKit-Turf
 [turf-area](https://github.com/Turfjs/turf/blob/master/packages/turf-area/) | `GeoJSON.Polygon.area`
 [turf-bearing](https://turfjs.org/docs/#bearing) | `GeoJSON.Position.direction(to:)`<br/> `RadianCoordinate2D.direction(to:)`
 [turf-bezier-spline](https://github.com/Turfjs/turf/tree/master/packages/turf-bezier-spline/) | `GeoJSON.LineString.bezier(resolution:sharpness:)`
-[turf-boolean-point-in-polygon](https://github.com/Turfjs/turf/tree/master/packages/turf-boolean-point-in-polygon) | `GeoJSON.Polygon.contains(_:ignoreBoundary:)`
+[turf-boolean-point-in-polygon](https://github.com/Turfjs/turf/tree/master/packages/turf-boolean-point-in-polygon) | `GeoJSON.Polygon.contains(_:)`
 [turf-center](http://turfjs.org/docs/#center) | `GeoJSON.Geometry.center()` |
 [turf-center-of-mass](http://turfjs.org/docs/#centerOfMass) | `GeoJSON.Geometry.centerOfMass()` |
 [turf-centroid](http://turfjs.org/docs/#centroid) | `GeoJSON.Geometry.centroid()` |
-[turf-circle](https://turfjs.org/docs/#circle) | `GeoJSON.Polygon(center:radius:vertices:)` |
+[turf-circle](https://turfjs.org/docs/#circle) | `GeoJSON.Polygon(center:radius:)` |
 [turf-convex](https://turfjs.org/docs/#convex) | `GeoJSON.convexHull()`<br/>`Collection<GeoJSON.Position>.convexHull()` |
 [turf-destination](https://github.com/Turfjs/turf/tree/master/packages/turf-destination/) | `GeoJSON.Position.coordinate(at:facing:)`<br/> `RadianCoordinate2D.coordinate(at:facing:)`
 [turf-distance](https://github.com/Turfjs/turf/tree/master/packages/turf-distance/) | `GeoJSON.Position.distance(to:)`<br/>`RadianCoordinate2D.distance(to:)`
diff --git a/Sources/GeoJSONKitTurf/Turf+Polygon.swift b/Sources/GeoJSONKitTurf/Turf+Polygon.swift
index 45db2c3..fd145af 100644
--- a/Sources/GeoJSONKitTurf/Turf+Polygon.swift
+++ b/Sources/GeoJSONKitTurf/Turf+Polygon.swift
@@ -11,10 +11,10 @@ extension GeoJSON.Polygon {
    - Parameter center: The center coordinate for the polygon.
    - Parameter radius: The radius of the polygon, measured in meters.
    - Parameter vertices: The number of vertices the polygon will have.
-   The recommended amount is 64.
+   The recommended and default amount is 64.
    - Returns: A polygon shape which approximates a circle.
    */
-  public init(center: GeoJSON.Position, radius: GeoJSON.Distance, vertices: Int) {
+  public init(center: GeoJSON.Position, radius: GeoJSON.Distance, vertices: Int = 64) {
     // The first and last coordinates in a polygon must be identical,
     // which is why we're using the inclusive range operator in this case.
     // Ported from https://github.com/Turfjs/turf/blob/17002ccd57e04e84ddb38d7e3ac8ede35b019c58/packages/turf-circle/index.ts