diff --git a/webapp/src/components/DevInfo.vue b/webapp/src/components/DevInfo.vue
index df049b7a4..024566ad3 100644
--- a/webapp/src/components/DevInfo.vue
+++ b/webapp/src/components/DevInfo.vue
@@ -76,14 +76,14 @@ export default defineComponent({
         },
         productionYear() {
             return() => {
-                return ((parseInt(this.devInfoList.serial.toString(), 16) >> (7 * 4)) & 0xF) + 2014;
+                return ((parseInt(this.devInfoList.serial, 16) >> (7 * 4)) & 0xF) + 2014;
             }
         },
         productionWeek() {
             return() => {
-                return ((parseInt(this.devInfoList.serial.toString(), 16) >> (5 * 4)) & 0xFF).toString(16);
+                return ((parseInt(this.devInfoList.serial, 16) >> (5 * 4)) & 0xFF).toString(16);
             }
         }
     }
 });
-</script>
\ No newline at end of file
+</script>