diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index 802aae3..4677c23 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -4,10 +4,10 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Use Node.js
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
-          node-version: '12.x'
+          node-version: '16.x'
       - run: npm install
       - run: npm test
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 4726faf..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-language: node_js
-cache: yarn
-node_js:
-  - stable
diff --git a/index.d.ts b/index.d.ts
index bf5f83b..dd30cff 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,21 +1,22 @@
 export type Input = number | string | Input[] | { [key: string]: Input };
 
-// Return same types as input but recursively cast number as string
-export type Output<T> = T extends number ? string : { [K in keyof T]: Output<T[K]> }
+// Return same types as input but recursively cast number as string if unit !== false
+export type Output<T, O> = T extends number ? O extends { unit: false } ? T : string : { [K in keyof T]: Output<T[K], O> }
 
 export type To = 'rem' | 'em' | 'px';
 
 export type Options = {
   baseline?: number;
   precision?: number;
+  unit?: boolean;
 }
 
-export function convert<Value extends Input>(value: Value, to?: To, options?: Options): Output<Value>;
+export function convert<I extends Input, _, O extends Options>(value: I, to?: To, options?: O): Output<I, O>;
 
-export function rem<Value extends Input>(value: Value, options?: Options): Output<Value>;
+export function rem<I extends Input, O extends Options>(value: I, options?: O): Output<I, O>;
 
-export function em<Value extends Input>(value: Value, baseline: Options['baseline'], options?: Omit<Options, 'baseline'>): Output<Value>;
+export function em<I extends Input, _, O extends Options>(value: I, baseline: Options['baseline'], options?: Omit<Options, 'baseline'>): Output<I, O>;
 
-export function px<Value extends Input>(value: Value, options?: Options): Output<Value>;
+export function px<I extends Input, O extends Options>(value: I, options?: Options): Output<I, O>;
 
 export default rem;
diff --git a/index.js b/index.js
index f37e55c..765da89 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,7 @@
 const defaults = {
   baseline: 16,
   precision: 5,
+  unit: true,
 };
 
 const rounded = (value, precision) => {
@@ -9,15 +10,15 @@ const rounded = (value, precision) => {
 };
 
 const convert = (value, to = 'rem', options = {}) => {
-  const { baseline, precision } = {...defaults, ...options};
+  const { baseline, precision, unit } = {...defaults, ...options};
 
   // Number
   if (typeof value === 'number') {
     if (to === 'px') {
-      return rounded(value * parseFloat(baseline), precision) + to;
+      return rounded(value * parseFloat(baseline), precision) + (unit ? to : 0);
     }
 
-    return rounded(value / parseFloat(baseline), precision) + to;
+    return rounded(value / parseFloat(baseline), precision) + (unit ? to : 0);
   }
 
   // Array
diff --git a/index.test.js b/index.test.js
index e0b5dee..c584e6f 100644
--- a/index.test.js
+++ b/index.test.js
@@ -42,13 +42,21 @@ it('Variable', () => run(
 ));
 
 it('Array', () => run(
-  [24, '24px', '5px -10px 1.5rem', {a: 24}],
-  ['1.5rem', '1.5rem', '0.3125rem -0.625rem 1.5rem', {a: '1.5rem'}]
+  [24, '24px', '5px -10px 1.5rem'],
+  ['1.5rem', '1.5rem', '0.3125rem -0.625rem 1.5rem']
 ));
 
 it('Object', () => run(
-  {fontSize: 24, margin: '24px', padding: '5px -10px 1.5rem', a: { b: [24] }},
-  {fontSize: '1.5rem', margin: '1.5rem', padding: '0.3125rem -0.625rem 1.5rem', a: { b: ['1.5rem']}}
+  {fontSize: 24, margin: '24px', padding: '5px -10px 1.5rem'},
+  {fontSize: '1.5rem', margin: '1.5rem', padding: '0.3125rem -0.625rem 1.5rem'}
+));
+
+it('Complex object with unitless output', () => run(
+  {a: 16, b: [24, 32], c: { d: [48, { e: 64 }] }},
+  {a: 1, b: [1.5, 2], c: { d: [3, { e: 4 }] }},
+  {
+    unit: false
+  }
 ));
 
 it('Changing baseline', () => run(
@@ -75,13 +83,20 @@ it('Converting to pixels', () => run(
   px
 ));
 
-it('Converting to pixels (unitless)', () => run(
+it('Converting to pixels (unitless input)', () => run(
   -1.5,
   '-24px',
   {},
   px
 ));
 
+it('Converting to pixels (unitless input and output)', () => run(
+  -1.5,
+  -24,
+  { unit: false },
+  px
+));
+
 it('Converting to em', () => run(
   '24px',
   '2em',
diff --git a/package.json b/package.json
index 88c6af9..a9663ff 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "startijenn-rem",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "JavaScript function to convert CSS rem units.",
   "keywords": [
     "javascript",
@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/pierreburel/startijenn-rem",
   "devDependencies": {
-    "jest": "^28.1.0",
-    "rollup": "^2.75.5"
+    "jest": "^29.5.0",
+    "rollup": "^3.20.2"
   }
 }