diff --git a/msgbox/msgbox.js b/msgbox/msgbox.js
index 406d21c2..c7b5cae7 100644
--- a/msgbox/msgbox.js
+++ b/msgbox/msgbox.js
@@ -22,8 +22,8 @@ function messageBox({
     messageBox.element.classList.remove('calculate-size');
 
     // for colorpicker
-    const MIN_WIDTH = 350;
-    const MIN_HEIGHT = 219;
+    const MIN_WIDTH = 310;
+    const MIN_HEIGHT = 250;
 
     const width = Math.max(Math.min(offsetWidth / 0.9 + 2, 800), MIN_WIDTH);
     const height = Math.max(Math.min(offsetHeight / 0.9 + 2, 600), MIN_HEIGHT);