diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 667385a..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-version: 2.1
-
-orbs:
-  win: circleci/windows@2.4.0
-
-workflows:
-  version: 2
-  test:
-    jobs:
-      - test_dotnetcore
-      - test_dotnetframework
-
-jobs:
-  test_dotnetcore:
-    docker:
-      - image: mcr.microsoft.com/dotnet/core/sdk:3.1-focal
-      - image: redis
-    steps:
-      - checkout
-      - run: dotnet restore
-      - run: dotnet build src/LaunchDarkly.ServerSdk.Redis -f netstandard2.0
-      - run: dotnet test test/LaunchDarkly.ServerSdk.Redis.Tests -f netcoreapp3.1
-
-  test_dotnetframework:
-    executor:
-      name: win/default
-      shell: powershell.exe
-    steps:
-      - checkout
-      - run:
-          name: install Redis
-          command: choco install redis-64
-          # Note, the redis-64 package is deprecated and no longer maintained so it does
-          # not include improvements made in Redis after Redis 3.x, and it would not be
-          # good to use it in production. But for our testing purposes here it's adequate.
-      - run: dotnet restore
-      - run: dotnet build src/LaunchDarkly.ServerSdk.Redis -f net462
-      - run: dotnet test test/LaunchDarkly.ServerSdk.Redis.Tests -f net462
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..ffa9311
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,64 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, 'feat/**' ]
+    paths-ignore:
+      - '**.md' # Do not need to run CI for markdown changes.
+  pull_request:
+    branches: [ main, 'feat/**' ]
+    paths-ignore:
+      - '**.md'
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+
+    services:
+      redis:
+        image: redis
+        ports:
+          - 6379:6379
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup dotnet build tools
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 8.0
+
+      - run: dotnet restore
+      - run: dotnet build src/LaunchDarkly.ServerSdk.Redis -f netstandard2.0
+      - run: dotnet test test/LaunchDarkly.ServerSdk.Redis.Tests -f net8.0
+
+  windows:
+    runs-on: windows-latest
+
+    defaults:
+      run:
+        shell: powershell
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup dotnet build tools
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 8.0
+
+      - name: Setup Redis
+        run: |
+          $ProgressPreference = "SilentlyContinue"
+          iwr -outf redis.zip https://github.com/MicrosoftArchive/redis/releases/download/win-3.0.504/Redis-x64-3.0.504.zip
+          mkdir redis
+          Expand-Archive -Path redis.zip -DestinationPath redis
+          cd redis
+          ./redis-server --service-install
+          ./redis-server --service-start
+          Start-Sleep -s 5
+          ./redis-cli ping
+
+      - run: dotnet restore
+      - run: dotnet build src/LaunchDarkly.ServerSdk.Redis -f net462
+      - run: dotnet test test/LaunchDarkly.ServerSdk.Redis.Tests -f net462
diff --git a/dotnet-server-sdk-shared-tests/LaunchDarkly.ServerSdk.SharedTests.Tests/LaunchDarkly.ServerSdk.SharedTests.Tests.csproj b/dotnet-server-sdk-shared-tests/LaunchDarkly.ServerSdk.SharedTests.Tests/LaunchDarkly.ServerSdk.SharedTests.Tests.csproj
index e2067a8..f69a7f2 100644
--- a/dotnet-server-sdk-shared-tests/LaunchDarkly.ServerSdk.SharedTests.Tests/LaunchDarkly.ServerSdk.SharedTests.Tests.csproj
+++ b/dotnet-server-sdk-shared-tests/LaunchDarkly.ServerSdk.SharedTests.Tests/LaunchDarkly.ServerSdk.SharedTests.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>net8.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <RootNamespace>LaunchDarkly.Sdk.Server.SharedTests</RootNamespace>
   </PropertyGroup>
diff --git a/test/LaunchDarkly.ServerSdk.Redis.Tests/LaunchDarkly.ServerSdk.Redis.Tests.csproj b/test/LaunchDarkly.ServerSdk.Redis.Tests/LaunchDarkly.ServerSdk.Redis.Tests.csproj
index 3f67265..8d1ddc1 100644
--- a/test/LaunchDarkly.ServerSdk.Redis.Tests/LaunchDarkly.ServerSdk.Redis.Tests.csproj
+++ b/test/LaunchDarkly.ServerSdk.Redis.Tests/LaunchDarkly.ServerSdk.Redis.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1;net462</TargetFrameworks>
+    <TargetFrameworks>net8.0;net462</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
     <RootNamespace>LaunchDarkly.Sdk.Server.Integrations</RootNamespace>