diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 646e64ed0..000000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,58 +0,0 @@
-version: 2.1
-
-orbs:
-  win: circleci/windows@2.4.0
-
-executors:
-  linux-build:
-    description: "Executor using Debian and .NET Core 3.1"
-    docker:
-      - image: mcr.microsoft.com/dotnet/core/sdk:3.1-buster
-    working_directory: /mnt/ramdisk
-
-jobs:
-  build_linux:
-    description: Build ModernUO with Debian
-    executor: linux-build
-    steps:
-      - run: rm -rf ~/project/.git # CircleCI git caching is likely broken
-      - checkout
-      - run:
-          name: Building ModernUO for Linux
-          command: Tools/publish.cmd linux
-  build_windows:
-    description: Build application
-    executor: win/default
-    steps:
-      - checkout
-      - run:
-          name: Building ModernUO for Windows
-          command: Tools/publish.cmd win
-  code_styling:
-    description: Code analysis
-    executor: linux-build
-    steps:
-      - run: rm -rf ~/project/.git # CircleCI git caching is likely broken
-      - checkout
-      - run:
-          name: Building with Analyzers
-          command: Tools/publish.cmd linux Analyze
-  tests:
-    description: Unit Tests
-    executor: linux-build
-    steps:
-      - run: rm -rf ~/project/.git # CircleCI git caching is likely broken
-      - checkout
-      - run:
-          name: Build native libraries
-          command: /mnt/ramdisk/Tools/build-native-libraries.sh
-      - run:
-          name: Running unit tests
-          command: dotnet test -r linux-x64
-workflows:
-  build-and-test:
-    jobs:
-      - build_linux
-      - build_windows
-      - code_styling
-      - tests
diff --git a/.github/workflows/dotnet-core.yml b/.github/workflows/dotnet-core.yml
new file mode 100644
index 000000000..963f5557e
--- /dev/null
+++ b/.github/workflows/dotnet-core.yml
@@ -0,0 +1,78 @@
+name: Build
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: windows-latest
+            rid: win-x64
+          - os: ubuntu-latest
+            rid: linux-x64
+          - os: macos-latest
+            rid: osx-x64
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 3.1.300
+    - name: NuGet Cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.nuget/packages
+          !~/.nuget/packages/argon2.bindings
+          !~/.nuget/packages/zlib.bindings
+        key: ${{ matrix.os }}-nuget-${{ hashFiles('Projects/**/*.csproj') }}
+        restore-keys: |
+          ${{ matrix.os }}-nuget-
+    - name: Argon2 Library Cache
+      id: argon2-cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.nuget/packages/argon2.bindings
+          Projects/ZLib/*
+          packages/Argon2.Bindings*.nupkg
+        key: ${{ matrix.os }}-argon2-${{ hashFiles('Projects/Argon2/*') }}
+        restore-keys: |
+          ${{ matrix.os }}-argon2-
+    - name: ZLib Library Cache
+      id: zlib-cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.nuget/packages/zlib.bindings
+          Projects/ZLib/*
+          packages/ZLib.Bindings*.nupkg
+        key: ${{ matrix.os }}-argon2-${{ hashFiles('Projects/Argon2/*') }}
+        restore-keys: |
+          ${{ matrix.os }}-argon2-
+    - name: Build ZLib
+      if: steps.zlib-cache.outputs.cache-hit != 'true'
+      run: |
+        dotnet build -c Release Projects/ZLib/ZLib.csproj
+        dotnet pack -c Release -o packages Projects/ZLib/ZLib.csproj
+    - name: Build Argon2
+      if: steps.argon2-cache.outputs.cache-hit != 'true'
+      run: |
+        dotnet build -c Release Projects/Argon2/Argon2.csproj
+        dotnet pack -c Release -o packages Projects/Argon2/Argon2.csproj
+    - name: Install dependencies
+      run: dotnet restore
+    - name: Build Server
+      run: dotnet build -c Release --no-restore Projects/Server/Server.csproj
+    - name: Build UO Content
+      run: dotnet build -c Release --no-restore Projects/UOContent/UOContent.csproj
+    - name: Test
+      run: dotnet test -r ${{ matrix.rid }} --no-restore --verbosity normal
diff --git a/README.md b/README.md
index ed8ca5289..e4eeb197e 100644
--- a/README.md
+++ b/README.md
@@ -12,14 +12,14 @@ ModernUO [![Discord](https://img.shields.io/discord/458277173208547350?logo=disc
 [![GitHub license](https://img.shields.io/github/license/modernuo/ModernUO?color=blue)](https://github.com/modernuo/ModernUO/blob/master/LICENSE)
 [![GitHub stars](https://img.shields.io/github/stars/modernuo/ModernUO?logo=github)](https://github.com/modernuo/ModernUO/stargazers)
 [![GitHub issues](https://img.shields.io/github/issues/modernuo/ModernUO?logo=github)](https://github.com/modernuo/ModernUO/issues)
-[![Build status](https://img.shields.io/circleci/build/gh/modernuo/ModernUO/master?logo=circleci)](https://circleci.com/gh/modernuo/ModernUO)
+[![GitHub build](https://img.shields.io/github/workflow/status/modernuo/ModernUO/Build%20(.NET%20Core%203.1)?logo=github)](https://github.com/modernuo/ModernUO/actions)
 
 ## Goals
 - See [Goals](./GOALS.md)
 
 ## Publishing a build
 #### Requirements
-- [.NET Core 3.1 SDK](https://dotnet.microsoft.com/download/dotnet-core/3.1)
+- [.NET Core 3.1.4 SDK](https://dotnet.microsoft.com/download/dotnet-core/3.1)
 
 #### Publishing
 OSX/Linux