diff --git a/README.md b/README.md
index 5604bb8..4042f11 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 A GitHub action that reports changes in compressed file sizes on your PRs.
 
-- Automatically uses `yarn`, `pnpm`, `bun`, or `npm ci` when lockfiles are present
+- Automatically uses `yarn`, `pnpm`, `bun`, `deno`, or `npm ci` when lockfiles are present
 - Builds your PR, then builds the target and compares between the two
 - Doesn't upload anything or rely on centralized storage
 - Supports [custom build scripts](#customizing-the-build) and [file patterns](#customizing-the-list-of-files)
diff --git a/src/utils.js b/src/utils.js
index 15f289a..fc4b8b7 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -7,12 +7,13 @@ import prettyBytes from 'pretty-bytes';
  * @returns {Promise<{ packageManager: string, installScript: string }>}
  */
 export async function getPackageManagerAndInstallScript(cwd) {
-	const [yarnLockExists, pnpmLockExists, bunLockBinaryExists, bunLockExists, packageLockExists] = await Promise.all([
+	const [yarnLockExists, pnpmLockExists, bunLockBinaryExists, bunLockExists, packageLockExists, denoLockExists] = await Promise.all([
 		fileExists(path.resolve(cwd, 'yarn.lock')),
 		fileExists(path.resolve(cwd, 'pnpm-lock.yaml')),
 		fileExists(path.resolve(cwd, 'bun.lockb')),
 		fileExists(path.resolve(cwd, 'bun.lock')),
 		fileExists(path.resolve(cwd, 'package-lock.json')),
+		fileExists(path.resolve(cwd, 'deno.lock')),
 	]);
 
 	let packageManager = 'npm';
@@ -26,6 +27,9 @@ export async function getPackageManagerAndInstallScript(cwd) {
 	} else if (bunLockBinaryExists || bunLockExists) {
 		installScript = 'bun install --frozen-lockfile';
 		packageManager = 'bun';
+	} else if (denoLockExists) {
+		installScript = 'deno install --frozen';
+		packageManager = 'deno';
 	} else if (packageLockExists) {
 		installScript = 'npm ci';
 	}