diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index bdece950d76d..e0233f5703a9 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -18,22 +18,22 @@ jobs:
         run:
             working-directory: src/swift/flwr
     name: Test
-    runs-on: macos-latest
+    runs-on: macos-14
     steps:
       - uses: fwal/setup-swift@v2
         with:
-          swift-version: 5
+          swift-version: 5.10
       - uses: actions/checkout@v4
       - name: Run tests
-        run: arch -x86_64 xcodebuild test -scheme flwr -destination 'platform=iOS Simulator,name=iPhone 14 Pro Max,OS=16.2'
+        run: arch -x86_64 xcodebuild test -scheme flwr -destination 'platform=iOS Simulator,name=iPhone 15 Pro Max,OS=17.2'
 
   build_docs:
-    runs-on: macos-latest
+    runs-on: macos-14
     name: Build docs
     steps:
       - uses: fwal/setup-swift@v2
         with:
-          swift-version: 5
+          swift-version: 5.10
       - uses: actions/checkout@v4
       - name: Build docs
         run: ./dev/build-swift-api-ref.sh
@@ -41,12 +41,12 @@ jobs:
   deploy_docs:
     needs: "build_docs"
     if: ${{ github.ref == 'refs/heads/main' && github.repository == 'adap/flower' && !github.event.pull_request.head.repo.fork }}
-    runs-on: macos-latest
+    runs-on: macos-14
     name: Deploy docs 
     steps:
       - uses: fwal/setup-swift@v2
         with:
-          swift-version: 5
+          swift-version: 5.10
       - uses: actions/checkout@v4
       - name: Build and deploy docs
         env:
diff --git a/dev/build-swift-api-ref.sh b/dev/build-swift-api-ref.sh
index 4a7943f6828f..5b88f9a68320 100755
--- a/dev/build-swift-api-ref.sh
+++ b/dev/build-swift-api-ref.sh
@@ -28,7 +28,7 @@ find ~/Library/Developer/Xcode/DerivedData -name "flwr.doccarchive" -exec rm -Rf
 # In case no XCode, please refer to: https://github.com/nodejs/node-gyp/issues/569.
 # Generate API reference for the Swift SDK by running `xcodebuild docbuild` in src directory.
 cd src/swift/flwr && \
-arch -x86_64 xcodebuild docbuild -scheme flwr -destination 'platform=iOS Simulator,name=iPhone 14 Pro Max,OS=16.2'
+arch -x86_64 xcodebuild docbuild -scheme flwr -destination 'platform=iOS Simulator,name=iPhone 15 Pro Max,OS=17.2'
 
 # Find the generated `doccarchive` file in XCode's derived data folder and copy it to the SwiftDoc directory.
 cd ../../../
diff --git a/src/swift/flwr/Package.swift b/src/swift/flwr/Package.swift
index 9ebef2d89870..8adf85d67117 100644
--- a/src/swift/flwr/Package.swift
+++ b/src/swift/flwr/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.6
+// swift-tools-version: 5.9
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "flwr",
     platforms: [
-        .iOS(.v13),
+        .iOS(.v16),
         ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.
@@ -19,8 +19,8 @@ let package = Package(
         // .package(url: /* package url */, from: "1.0.0"),
         .package(url: "https://github.com/pvieito/PythonKit.git", branch: "master"),
         .package(url: "https://github.com/kewlbear/NumPy-iOS.git", branch: "main"),
-        .package(url: "https://github.com/grpc/grpc-swift.git", from: "1.0.0"),
-        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.1.0"),
+        .package(url: "https://github.com/grpc/grpc-swift.git", from: "1.22.0"),
+        .package(url: "https://github.com/apple/swift-protobuf.git", from: "1.26.0"),
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
@@ -30,7 +30,8 @@ let package = Package(
             dependencies: [
                 .product(name: "GRPC", package: "grpc-swift"),
                 .product(name: "NumPy-iOS", package: "NumPy-iOS"),
-                .product(name: "PythonKit", package: "PythonKit")],
+                .product(name: "PythonKit", package: "PythonKit"),
+                .product(name: "SwiftProtobuf", package: "swift-protobuf")],
             path: "Sources/Flower"),
         .testTarget(
             name: "FlowerTests",