diff --git a/.github/workflows/PR.yml b/.github/workflows/PR.yml
new file mode 100644
index 0000000..12b68f2
--- /dev/null
+++ b/.github/workflows/PR.yml
@@ -0,0 +1,20 @@
+name: PR
+
+on: pull_request
+
+jobs:
+  build:
+    name: build
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Select Xcode 11.3
+        run: sudo xcode-select -s /Applications/Xcode_11.3.app
+      - name: Install dependencies
+        run: brew install ninja cmake lrzip
+      - name: Cloning Swift
+        run: ./clone.sh
+      - name: Building Swift
+        run: ./build.sh
+      - name: Packaging Swift
+        run: ./package.sh
diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
new file mode 100644
index 0000000..90d884c
--- /dev/null
+++ b/.github/workflows/master.yml
@@ -0,0 +1,43 @@
+name: master
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Build and Publish
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Select Xcode 11.3
+        run: sudo xcode-select -s /Applications/Xcode_11.3.app
+      - name: Install Dependencies
+        run: brew install ninja cmake lrzip
+      - name: Clone Swift Repos
+        run: ./clone.sh
+      - name: Build Swift
+        run: ./build.sh
+      - name: Package Swift
+        run: ./package.sh
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: false
+          prerelease: false
+      - name: Upload Release Asset
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps
+          asset_path: ./release/*
+          asset_name: my-artifact.zip
+          asset_content_type: application/zip
diff --git a/SWIFT-VERSION b/SWIFT-VERSION
index a6b3d05..8ed5184 100644
--- a/SWIFT-VERSION
+++ b/SWIFT-VERSION
@@ -1 +1 @@
-swift-5.0.1-RELEASE
+swift-5.1.3-RELEASE
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
deleted file mode 100644
index 36fb770..0000000
--- a/azure-pipelines.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-# Starter pipeline
-# Start with a minimal pipeline that you can customize to build and deploy your code.
-# Add steps that build, run tests, deploy, and more:
-# https://aka.ms/yaml
-
-trigger:
-- master
-
-pr:
-  autoCancel: true
-  branches:
-    include:
-    - master
-
-jobs:
-- job: macOS
-  timeoutInMinutes: 360
-  displayName: macOS
-  # According to
-  # https://github.com/Microsoft/azure-pipelines-image-generation/blob/master/images/macos/macos-10.14-Readme.md
-  # macOS-10.14 comes with Xcode 10.2.1
-  pool:
-    displayName: 'macOS 10.14'
-    vmImage: 'macOS-10.14'
-    demands: xcode
-  steps:
-  - script: 'brew install ninja cmake lrzip'
-    displayName: 'Installing build dependencies'
-  - script: |
-      ./clone.sh
-    displayName: 'Cloning Swift'
-  - script: |
-      ./build.sh
-    displayName: 'Building Swift'
-  - script: |
-      ./package.sh
-    displayName: 'Packaging Swift'
-  - task: GitHubRelease@0
-    displayName: 'Creating Github Release'
-    condition: startsWith(variables['Build.SourceBranch'], 'refs/tags/swift-')
-    inputs:
-      gitHubConnection: GHRelease
-      repositoryName: '$(Build.Repository.Name)'
-      action: 'create' # Options: create, edit, delete
-      target: '$(Build.SourceVersion)' # Required when action == Create || Action == Edit
-      tagSource: 'manual' # Required when action == Create# Options: auto, manual
-      tag: '$(Build.SourceVersion)-$(Build.BuildNumber)'
-      assets: 'release/*'
-      releaseNotesSource: 'file' # Optional. Options: file, input
-      releaseNotesFile: 'checksums.md' # Optional
diff --git a/build.sh b/build.sh
index f389334..e4821be 100755
--- a/build.sh
+++ b/build.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -x
+
 set -euo pipefail
 
 SWIFT_SOURCE=/tmp/swift-source
diff --git a/clone.sh b/clone.sh
index 9d515a1..c3aed90 100755
--- a/clone.sh
+++ b/clone.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -x
+
 set -euo pipefail
 
 SWIFT_VERSION=$(cat SWIFT-VERSION)
@@ -8,4 +10,5 @@ SWIFT_SOURCE=/tmp/swift-source
 mkdir $SWIFT_SOURCE
 cd $SWIFT_SOURCE
 git clone https://github.com/apple/swift.git
+(cd swift && git checkout "$SWIFT_VERSION")
 ./swift/utils/update-checkout --clone --tag "$SWIFT_VERSION"
diff --git a/package.sh b/package.sh
index ad414d8..225ca9f 100755
--- a/package.sh
+++ b/package.sh
@@ -11,7 +11,7 @@ BUILD_DIR=build/Ninja-RelWithDebInfoAssert
 RELEASE=release
 mkdir -p $RELEASE
 
-case `uname -s` in
+case $(uname -s) in
     Darwin)
         OS=macosx
         ;;