diff --git a/index.html b/index.html
index 925d3d9..8031322 100644
--- a/index.html
+++ b/index.html
@@ -1953,6 +1953,7 @@ function copyCalculatorLink() {
 function openCalculator() {
   document.getElementById('calculatorSection').classList.add('expanded');
   document.getElementById('heroSection').style.minHeight = 'auto';
+  updateSharedLinkBox();
 }
 
 function scrollToCalculator() {