diff --git a/scripts/check-package-version.mjs b/scripts/check-package-version.mjs
index 6a6cbc3..445e480 100755
--- a/scripts/check-package-version.mjs
+++ b/scripts/check-package-version.mjs
@@ -21,7 +21,7 @@ const { values } = parseArgs({
     }
 });
 
-if (!["major", "minor", "patch"].includes(values.bump)) {
+if (values.bump !== undefined && !["major", "minor", "patch"].includes(values.bump)) {
     console.error(`Invalid bump type: ${values.bump}. Allowed values are: major, minor, patch.`);
     process.exit(1);
 }