diff --git a/js/planner.js b/js/planner.js
index 004895c..8bb40d2 100644
--- a/js/planner.js
+++ b/js/planner.js
@@ -1110,7 +1110,7 @@ function renderInfoPanel(plan) {
 
     const shieldInput = el.querySelector('#plan-shield-k-input');
     if (shieldInput) {
-        shieldInput.addEventListener('input', () => {
+        shieldInput.addEventListener('change', () => {
             const val = parseFloat(shieldInput.value) || 0;
             updatePlan(plan.id, { shieldK: val > 0 ? val : null });
             refreshMechanicList(plan.id);