diff --git a/views/scripts/roll_buttons.js b/views/scripts/roll_buttons.js
index aee0286..5573249 100644
--- a/views/scripts/roll_buttons.js
+++ b/views/scripts/roll_buttons.js
@@ -115,7 +115,7 @@ let endTime = performance.now();
 let unit = 88;
 let gap = 8;
 let scrollX = (unit + gap) * buttons.length * 2;
-let speed = 50;
+let speed = 25;
 let max = (unit + gap) * buttons.length;
 function scrollButtons(startTime) {
   let deltaTime = (startTime - endTime) / 1000;