diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index db8dbec..c17258c 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -2,28 +2,32 @@ name: Swift
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   macos:
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Build
-      run: swift build
-    - name: Test
-      run: swift test
+      - uses: actions/checkout@v3
+      - name: Build
+        run: swift build
+      - name: Test
+        run: swift test
 
   linux:
     runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        swift: ["5.9.1", "5.7.3"]
+
     container:
-      image: swift:5.4
+      image: swift:${{ matrix.swift }}
     steps:
-    - uses: actions/checkout@v2
-    - name: Build
-      run: swift build
-    - name: Test
-      run: swift test
-
+      - uses: actions/checkout@v3
+      - name: Build
+        run: swift build
+      - name: Test
+        run: swift test
diff --git a/Package.swift b/Package.swift
index 25b87a6..4577147 100644
--- a/Package.swift
+++ b/Package.swift
@@ -5,7 +5,7 @@ import PackageDescription
 let package = Package(
   name: "GeoJSONKitTurf",
   platforms: [
-    .macOS(.v10_12), .iOS(.v10), .watchOS(.v3), .tvOS(.v12),
+    .macOS(.v12), .iOS(.v15), .watchOS(.v8), .tvOS(.v15),
     .custom("xros", versionString: "1.0")
   ],
   products: [
@@ -17,14 +17,16 @@ let package = Package(
       targets: ["GeoKitten"]),
   ],
   dependencies: [
-    .package(name: "GeoJSONKit", url: "https://github.com/maparoni/geojsonkit.git", from: "0.5.2"),
+    .package(url: "https://github.com/maparoni/geojsonkit.git", from: "0.5.2"),
 //    .package(name: "GeoJSONKit", path: "../GeoJSONKit"),
     .package(url: "https://github.com/apple/swift-argument-parser", .upToNextMajor(from: "1.0.0")),
   ],
   targets: [
     .target(
       name: "GeoJSONKitTurf",
-      dependencies: ["GeoJSONKit"]),
+      dependencies: [
+        .product(name: "GeoJSONKit", package: "geojsonkit"),
+      ]),
     .executableTarget(
       name: "GeoKitten",
       dependencies: [
diff --git a/README.md b/README.md
index 362cc35..d762a5a 100644
--- a/README.md
+++ b/README.md
@@ -8,14 +8,14 @@ This package provides various geospatial extensions for [GeoJSONKit](https://git
 
 ## Requirements
 
-GeoJSONKitTurf requires Xcode 12.x and supports the following minimum deployment targets:
+GeoJSONKitTurf requires Xcode 14.x and supports the following minimum deployment targets:
 
-* iOS 10.0 and above
-* macOS 10.12 (Sierra) and above
-* tvOS 10.0 and above
-* watchOS 3.0 and above
+- iOS 15 and above
+- macOS 12 and above
+- tvOS 15 and above
+- watchOS 8.0 and above
 
-It's also compatible with Linux (and possibly other platforms), as long as you have [Swift](https://swift.org/download/) 5.3 (or above) installed.
+It's also compatible with Linux (and possibly other platforms), as long as you have [Swift](https://swift.org/download/) 5.7 (or above) installed.
 
 ## Installation
 
@@ -27,7 +27,7 @@ To install GeoJSONKitTurf using the [Swift Package Manager](https://swift.org/pa
 .package(name: "GeoJSONKitTurf", url: "https://github.com/maparoni/geojsonkit-turf", from: "0.1.0")
 ```
 
-Then use: 
+Then use:
 
 ```swift
 import GeoJSONKitTurf
@@ -85,6 +85,7 @@ First clone or download the repository, then run this:
 swift build -c release
 sudo cp .build/release/geokitten /usr/local/bin/geokitten
 ```
+
 </details>
 
 <details>
@@ -95,4 +96,5 @@ mint install maparoni/GeoJSONKit-Turf@main
 ```
 
 If you get a permissions error, check [this Mint issue](https://github.com/yonaskolb/Mint/issues/188).
+
 </details>
diff --git a/Sources/GeoJSONKitTurf/Turf+GeometryObject.swift b/Sources/GeoJSONKitTurf/Turf+GeometryObject.swift
index 814e87c..63dacf7 100644
--- a/Sources/GeoJSONKitTurf/Turf+GeometryObject.swift
+++ b/Sources/GeoJSONKitTurf/Turf+GeometryObject.swift
@@ -3,10 +3,10 @@ import Foundation
 import GeoJSONKit
 
 extension GeoJSON.Geometry {
-  public func contains(_ coordinate: GeoJSON.Position, ignoreBoundary: Bool = false) -> Bool {
+  public func contains(_ coordinate: GeoJSON.Position, ignoreBoundary: Bool = false, checkBoundingBox: Bool = true) -> Bool {
     switch self {
     case .polygon(let polygon):
-      return polygon.contains(coordinate, ignoreBoundary: ignoreBoundary)
+      return polygon.contains(coordinate, ignoreBoundary: ignoreBoundary, checkBoundingBox: checkBoundingBox)
     case .lineString, .point:
       return false
     }
@@ -109,14 +109,14 @@ extension GeoJSON.GeometryObject {
    *
    * Calls contains function for each contained polygon
    */
-  public func contains(_ coordinate: GeoJSON.Position, ignoreBoundary: Bool = false) -> Bool {
+  public func contains(_ coordinate: GeoJSON.Position, ignoreBoundary: Bool = false, checkBoundingBox: Bool = true) -> Bool {
     switch self {
     case .single(let geometry):
-      return geometry.contains(coordinate, ignoreBoundary: ignoreBoundary)
+      return geometry.contains(coordinate, ignoreBoundary: ignoreBoundary, checkBoundingBox: checkBoundingBox)
     case .multi(let geometries):
-      return geometries.contains(where: { $0.contains(coordinate, ignoreBoundary: ignoreBoundary) })
+      return geometries.contains(where: { $0.contains(coordinate, ignoreBoundary: ignoreBoundary, checkBoundingBox: checkBoundingBox) })
     case .collection(let objects):
-      return objects.contains(where: { $0.contains(coordinate, ignoreBoundary: ignoreBoundary) })
+      return objects.contains(where: { $0.contains(coordinate, ignoreBoundary: ignoreBoundary, checkBoundingBox: checkBoundingBox) })
     }
   }
 }
diff --git a/Sources/GeoJSONKitTurf/Turf+LinearRing.swift b/Sources/GeoJSONKitTurf/Turf+LinearRing.swift
index 8f2992a..44e2bb0 100644
--- a/Sources/GeoJSONKitTurf/Turf+LinearRing.swift
+++ b/Sources/GeoJSONKitTurf/Turf+LinearRing.swift
@@ -55,7 +55,7 @@ extension GeoJSON.Polygon.LinearRing {
    *
    * Ported from: https://github.com/Turfjs/turf/blob/e53677b0931da9e38bb947da448ee7404adc369d/packages/turf-boolean-point-in-polygon/index.ts#L77-L108
    */
-  public func contains(_ coordinate: GeoJSON.Position, ignoreBoundary: Bool = false) -> Bool {
+  public func contains(_ coordinate: GeoJSON.Position, ignoreBoundary: Bool = false, checkBoundingBox: Bool = true) -> Bool {
     
     // Optimization for triangles, using barycentric method
     guard positions.count > 3 else {
@@ -83,10 +83,12 @@ extension GeoJSON.Polygon.LinearRing {
             : (s >= 0 && s + t <= a)
     }
     
-    
-    let bbox = GeoJSON.BoundingBox(positions: positions)
-    guard bbox.contains(coordinate, ignoreBoundary: ignoreBoundary) else {
-      return false
+
+    if checkBoundingBox {
+      let bbox = GeoJSON.BoundingBox(positions: positions)
+      guard bbox.contains(coordinate, ignoreBoundary: ignoreBoundary) else {
+        return false
+      }
     }
     
     let coordinates = positions
diff --git a/Sources/GeoJSONKitTurf/Turf+Polygon.swift b/Sources/GeoJSONKitTurf/Turf+Polygon.swift
index 5e69270..45db2c3 100644
--- a/Sources/GeoJSONKitTurf/Turf+Polygon.swift
+++ b/Sources/GeoJSONKitTurf/Turf+Polygon.swift
@@ -42,12 +42,12 @@ extension GeoJSON.Polygon {
   /// lies on the boundary line of the polygon or its interior rings.
   ///
   ///Ported from: https://github.com/Turfjs/turf/blob/e53677b0931da9e38bb947da448ee7404adc369d/packages/turf-boolean-point-in-polygon/index.ts#L31-L75
-  public func contains(_ position: GeoJSON.Position, ignoreBoundary: Bool = false) -> Bool {
-    guard exterior.contains(position, ignoreBoundary: ignoreBoundary) else {
+  public func contains(_ position: GeoJSON.Position, ignoreBoundary: Bool = false, checkBoundingBox: Bool = true) -> Bool {
+    guard exterior.contains(position, ignoreBoundary: ignoreBoundary, checkBoundingBox: checkBoundingBox) else {
       return false
     }
     for ring in interiors {
-      if ring.contains(position, ignoreBoundary: !ignoreBoundary) {
+      if ring.contains(position, ignoreBoundary: !ignoreBoundary, checkBoundingBox: false) {
         return false
       }
     }