diff --git a/lib/common-utils.cjs b/lib/common-utils.cjs
index ac5155f..d0a5b9d 100644
--- a/lib/common-utils.cjs
+++ b/lib/common-utils.cjs
@@ -23,9 +23,10 @@ function getPackageJson(cwd = process.cwd()) {
 
 function getThemePackage() {
 	const packageJson = getPackageJson();
-	return Object.keys(packageJson.dependencies).find((name) =>
-		name.startsWith('auto-reveal-theme-'),
-	);
+	return [
+		...Object.keys(packageJson.dependencies),
+		...Object.keys(packageJson.devDependencies),
+	].find((name) => name.startsWith('auto-reveal-theme-'));
 }
 
 function getTheme() {