diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..b2ee12b
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,16 @@
+name: Node.js CI
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '20.x'
+      - run: npm ci
+      - run: npm run lint
+      - run: npm test
+      - run: npm run tsc
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index ef25ed7..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-language: node_js
-sudo: false
-node_js:
-  - "13.9.0"
-install:
-  - npm install
-script:
-  - npm run lint
-  - npm test
-  - npm run tsc
diff --git a/src/command-line-parser/command-line.interface.ts b/src/command-line-parser/command-line.interface.ts
index 844e355..6cf7713 100644
--- a/src/command-line-parser/command-line.interface.ts
+++ b/src/command-line-parser/command-line.interface.ts
@@ -4,7 +4,7 @@ export interface ArgumentOptions {
   alias: string;
 }
 
-export type CommandLineDefinitions = Array<Partial<ArgumentOptions>>;
+export type CommandLineDefinitions = Partial<ArgumentOptions>[];
 
 export interface Argv {
   help: boolean;