diff --git a/scripts/utils.mts b/scripts/utils.mts
index 5b84c9878..2027bed28 100644
--- a/scripts/utils.mts
+++ b/scripts/utils.mts
@@ -16,15 +16,11 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-/**
- * @param {string} filePath
- * @returns {string | null}
- */
-export function getPluginTarget(filePath) {
+export function getPluginTarget(filePath: string) {
     const pathParts = filePath.split(/[/\\]/);
-    if (/^index\.tsx?$/.test(pathParts.at(-1))) pathParts.pop();
+    if (/^index\.tsx?$/.test(pathParts.at(-1)!)) pathParts.pop();
 
-    const identifier = pathParts.at(-1).replace(/\.tsx?$/, "");
+    const identifier = pathParts.at(-1)!.replace(/\.tsx?$/, "");
     const identiferBits = identifier.split(".");
     return identiferBits.length === 1 ? null : identiferBits.at(-1);
 }