diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
new file mode 100644
index 0000000..e2f4eac
--- /dev/null
+++ b/.github/workflows/haskell.yml
@@ -0,0 +1,65 @@
+name: Haskell CI
+
+on:
+  push: ~
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-haskell@v1
+      with:
+        enable-stack: true
+        stack-no-global: true
+        stack-version: 'latest'
+
+    - name: Cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.stack
+          graphql.cabal
+          stack.yaml.lock
+        key: ${{ runner.os }}-build-${{ hashFiles('**/stack.yaml') }}
+        restore-keys: '${{ runner.os }}-build-'
+
+    - name: Install dependencies
+      run: stack --no-terminal test --only-snapshot
+    - name: Run tests
+      run: stack --no-terminal test --pedantic
+    - name: Build the documentation
+      run: |
+        stack --no-terminal ghc -- -Wall -Werror -fno-code docs/tutorial/tutorial.lhs
+        stack --no-terminal haddock --no-haddock-deps
+
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-haskell@v1
+      with:
+        enable-stack: true
+        stack-no-global: true
+        stack-version: 'latest'
+
+    - name: Cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.stack
+          graphql.cabal
+          stack.yaml.lock
+        key: ${{ runner.os }}-build-${{ hashFiles('**/stack.yaml') }}
+        restore-keys: '${{ runner.os }}-build-'
+
+    - name: Build HLint
+      run: stack --no-terminal build hlint
+    - name: Install HLint
+      run: stack --no-terminal install hlint
+    - name: Lint
+      run: stack --no-terminal exec hlint -- src tests docs
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f42be0a..5f0a1b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on
 and this project adheres to
 [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
+## [Unreleased]
 ## [0.8.0.0] - 2020-06-20
 ### Fixed
 - The parser rejects variables when parsing defaultValue (DefaultValue). The
@@ -267,6 +268,7 @@ and this project adheres to
 ### Added
 - Data types for the GraphQL language.
 
+[Unreleased]: https://github.com/caraus-ecms/graphql/compare/v0.8.0.0...HEAD
 [0.8.0.0]: https://github.com/caraus-ecms/graphql/compare/v0.7.0.0...v0.8.0.0
 [0.7.0.0]: https://github.com/caraus-ecms/graphql/compare/v0.6.1.0...v0.7.0.0
 [0.6.1.0]: https://github.com/caraus-ecms/graphql/compare/v0.6.0.0...v0.6.1.0
diff --git a/README.md b/README.md
index f44e429..a27596f 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Haskell GraphQL
 
 [![Hackage Version](https://img.shields.io/hackage/v/graphql.svg)](https://hackage.haskell.org/package/graphql)
-[![Build Status](https://semaphoreci.com/api/v1/belka-ew/graphql/branches/master/badge.svg)](https://semaphoreci.com/belka-ew/graphql)
+[![Build Status](https://github.com/caraus-ecms/graphql/workflows/Haskell%20CI/badge.svg)](https://github.com/caraus-ecms/graphql/actions?query=workflow%3A%22Haskell+CI%22)
 [![License](https://img.shields.io/badge/license-BSD--3--Clause-blue.svg)](https://raw.githubusercontent.com/caraus-ecms/graphql/master/LICENSE)
 
 GraphQL implementation in Haskell.
diff --git a/stack.yaml b/stack.yaml
index a037a72..e99e8c3 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-16.1
+resolver: lts-16.2
 
 packages:
 - .