diff --git a/.github/actions/ci/action.yml b/.github/actions/ci/action.yml
index d07a9a2..d17638c 100644
--- a/.github/actions/ci/action.yml
+++ b/.github/actions/ci/action.yml
@@ -23,9 +23,11 @@ runs:
 
     - name: Install mint
       shell: bash
-      run: |
-        brew tap mint-lang/mint-lang
-        brew install mint-lang
+      run: brew install mint
+
+    - name: Bootstrap Mint packages
+      shell: bash
+      run: mint bootstrap
 
     - name: Install cocoapods
       shell: bash
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2e219d0..a230899 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,12 +17,9 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - xcode-version: 15.0.1
-            ios-sim: 'platform=iOS Simulator,name=iPhone 17,OS=17.0'
-            os: macos-13
-          - xcode-version: 14.3.1
-            ios-sim: 'platform=iOS Simulator,name=iPhone 16,OS=16.4'
-            os: macos-13
+          - xcode-version: 15.4.0
+            ios-sim: 'platform=iOS Simulator,name=iPhone 15'
+            os: macos-14
 
     steps:
       - uses: actions/checkout@v4
@@ -59,14 +56,14 @@ jobs:
         run: swift test --enable-test-discovery
 
   windows-build:
-    name: Windows - Swift 5.9
+    name: Windows - Swift 6.1
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v4
       - name: Install Swift
         uses: compnerd/gha-setup-swift@cd348eb89f2f450b0664c07fb1cb66880addf17d
         with:
-          branch: swift-5.9-release
-          tag: 5.9-RELEASE
+          branch: swift-6.1-release
+          tag: 6.1-RELEASE
       - name: Build and test
         run: swift test
diff --git a/.github/workflows/manual-publish-docs.yml b/.github/workflows/manual-publish-docs.yml
index 20f13d3..9b05e93 100644
--- a/.github/workflows/manual-publish-docs.yml
+++ b/.github/workflows/manual-publish-docs.yml
@@ -4,7 +4,7 @@ on:
 name: Publish Documentation
 jobs:
   build-publish:
-    runs-on: macos-13
+    runs-on: macos-14
 
     permissions:
       id-token: write # Needed if using OIDC to get release secrets.
@@ -16,8 +16,8 @@ jobs:
       - name: Build and Test
         uses: ./.github/actions/ci
         with:
-          xcode-version: 14.3.1
-          ios-sim: 'platform=iOS Simulator,name=iPhone 16,OS=16.4'
+          xcode-version: 15.4.0
+          ios-sim: 'platform=iOS Simulator,name=iPhone 15'
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - uses: ./.github/actions/build-docs
diff --git a/.github/workflows/manual-publish.yml b/.github/workflows/manual-publish.yml
index afdb80a..08568f5 100644
--- a/.github/workflows/manual-publish.yml
+++ b/.github/workflows/manual-publish.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   build-publish:
-    runs-on: macos-13
+    runs-on: macos-14
 
     # Needed to get tokens during publishing.
     permissions:
@@ -27,8 +27,8 @@ jobs:
 
       - uses: ./.github/actions/ci
         with:
-          xcode-version: 14.3.1
-          ios-sim: 'platform=iOS Simulator,name=iPhone 16,OS=16.4'
+          xcode-version: 15.4.0
+          ios-sim: 'platform=iOS Simulator,name=iPhone 15'
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - uses: ./.github/actions/publish
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index f072232..cff733f 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   release-package:
-    runs-on: macos-13
+    runs-on: macos-14
 
     permissions:
       id-token: write # Needed if using OIDC to get release secrets.
@@ -45,8 +45,8 @@ jobs:
       - uses: ./.github/actions/ci
         if: ${{ steps.release.outputs.releases_created == 'true' }}
         with:
-          xcode-version: 14.3.1
-          ios-sim: 'platform=iOS Simulator,name=iPhone 16,OS=16.4'
+          xcode-version: 15.4.0
+          ios-sim: 'platform=iOS Simulator,name=iPhone 15'
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - uses: ./.github/actions/build-docs
diff --git a/Makefile b/Makefile
index 05c5e1f..d87990e 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ start-contract-test-service-bg:
 
 run-contract-tests:
 	curl -s https://raw.githubusercontent.com/launchdarkly/sse-contract-tests/main/downloader/run.sh \
-		| VERSION=v1 PARAMS="-url http://localhost:8000 -debug -stop-service-at-end -skip 'basic parsing/large message in one chunk' -skip 'basic parsing/large message in two chunks'" sh
+		| VERSION=v2 PARAMS="-url http://localhost:8000 -debug -stop-service-at-end -skip 'basic parsing/large message in one chunk' -skip 'basic parsing/large message in two chunks'" sh
 
 contract-tests: build-contract-tests start-contract-test-service-bg run-contract-tests
 
diff --git a/Mintfile b/Mintfile
index 089790b..556adef 100644
--- a/Mintfile
+++ b/Mintfile
@@ -1 +1 @@
-realm/SwiftLint@0.49.1
+realm/SwiftLint@0.56.2