diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 528921e..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-version: 2
-jobs:
-  test_debug:
-    docker:
-      - image: tschijnmo/drudge:corebase
-    steps:
-      - run: |
-          git clone --recurse-submodules https://github.com/tschijnmo/libcanon.git
-          mkdir cmake-test-debug
-          cd cmake-test-debug
-          cmake -DCMAKE_BUILD_TYPE=debug ../libcanon
-          make
-          ctest
-
-  test_release:
-    docker:
-      - image: tschijnmo/drudge:corebase
-    steps:
-      - run: |
-          git clone --recurse-submodules https://github.com/tschijnmo/libcanon.git
-          mkdir cmake-test-release
-          cd cmake-test-release
-          cmake -DCMAKE_BUILD_TYPE=release ../libcanon
-          make
-          ctest
-
-workflows:
-  version: 2
-  tests:
-    jobs:
-      - test_debug
-      - test_release
-
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..9127143
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,76 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - 'release/*'
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  test_debug:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y cmake g++
+    
+    - name: Configure CMake (Debug)
+      run: |
+        mkdir -p build-debug
+        cd build-debug
+        cmake -DCMAKE_BUILD_TYPE=debug ..
+    
+    - name: Build (Debug)
+      run: |
+        cd build-debug
+        make
+    
+    - name: Run tests (Debug)
+      run: |
+        cd build-debug
+        ctest --output-on-failure
+
+  test_release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y cmake g++
+    
+    - name: Configure CMake (Release)
+      run: |
+        mkdir -p build-release
+        cd build-release
+        cmake -DCMAKE_BUILD_TYPE=release ..
+    
+    - name: Build (Release)
+      run: |
+        cd build-release
+        make
+    
+    - name: Run tests (Release)
+      run: |
+        cd build-release
+        ctest --output-on-failure
diff --git a/.gitignore b/.gitignore
index 2242dee..3c6e104 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,3 +30,8 @@
 
 # For Clion
 .idea/workspace.xml
+
+# Build directories
+build/
+build-*/
+cmake-build-*/
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index c6c374f..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-sudo: required
-
-language:
-  - cpp
-
-services:
-  - docker
-
-install:
-  - docker build -t tschijnmo/libcanon_test .
-
-script:
-  - >
-    docker run --rm tschijnmo/libcanon_test /bin/sh -c
-    "mkdir _build;
-    cd _build;
-    cmake ..;
-    make;
-    ctest;
-    "
-
diff --git a/.ycm_extra_conf.py b/.ycm_extra_conf.py
deleted file mode 100644
index e34f0a9..0000000
--- a/.ycm_extra_conf.py
+++ /dev/null
@@ -1,17 +0,0 @@
-import os
-
-def FlagsForFile(filename, **kwargs):
-
-    flags = ['-std=c++14', '-I/usr/local/include']
-
-    proj_root = os.path.dirname(os.path.abspath(__file__))
-    proj_include = ''.join(['-I', proj_root, '/include'])
-    flags.append(proj_include)
-
-    if filename.endswith('_test.cpp'):
-        gtest_include = ''.join([
-            '-I', proj_root, '/test/googletest/googletest/include'
-            ])
-        flags.append(gtest_include)
-
-    return {'flags': flags}
diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index bbd9002..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,9 +0,0 @@
-# Dockerfile for a test environment for libcanon.
-
-FROM gcc:latest
-
-RUN apt-get update && apt-get install -y --no-install-recommends cmake
-
-WORKDIR /libcanon/
-ADD . .
-
diff --git a/README.md b/README.md
index 2861ef5..7e3d0c3 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[![Build Status](https://circleci.com/gh/tschijnmo/libcanon.svg?style=shield)](https://circleci.com/gh/tschijnmo/libcanon)
+[![CI](https://github.com/DrudgeCAS/libcanon/actions/workflows/ci.yml/badge.svg)](https://github.com/DrudgeCAS/libcanon/actions/workflows/ci.yml)
 
 # libcanon