diff --git a/SunnyUI/Controls/UICheckBox.cs b/SunnyUI/Controls/UICheckBox.cs
index fab1079d..5d46690e 100644
--- a/SunnyUI/Controls/UICheckBox.cs
+++ b/SunnyUI/Controls/UICheckBox.cs
@@ -24,6 +24,7 @@
  * 2023-05-12: V3.3.6 重构DrawString函数
  * 2023-11-07: V3.5.2 增加修改图标大小
  * 2023-12-04: V3.6.1 增加属性可修改图标大小
+ * 2024-08-26: V3.6.9 修复AutoSize在文字改变时未自动显示的问题，#IAKYX4
 ******************************************************************************/
 
 using System;
@@ -67,8 +68,8 @@ namespace Sunny.UI
             if (AutoSize && Dock == DockStyle.None)
             {
                 Size sf = TextRenderer.MeasureText(Text, Font);
-                int w = sf.Width + CheckBoxSize + 3;
-                int h = Math.Max(CheckBoxSize, sf.Height) + 2;
+                int w = sf.Width + CheckBoxSize + 7;
+                int h = Math.Max(CheckBoxSize, sf.Height) + 5;
                 if (Width != w) Width = w;
                 if (Height != h) Height = h;
             }
@@ -253,5 +254,11 @@ namespace Sunny.UI
             get => fillColor;
             set => SetFillColor(value);
         }
+
+        protected override void OnTextChanged(EventArgs e)
+        {
+            base.OnTextChanged(e);
+            Invalidate();
+        }
     }
 }
\ No newline at end of file
diff --git a/SunnyUI/Controls/UIRadioButton.cs b/SunnyUI/Controls/UIRadioButton.cs
index 8de65167..5d98162d 100644
--- a/SunnyUI/Controls/UIRadioButton.cs
+++ b/SunnyUI/Controls/UIRadioButton.cs
@@ -25,6 +25,7 @@
  * 2023-05-12: V3.3.6 重构DrawString函数
  * 2023-11-07: V3.5.2 增加修改图标大小
  * 2023-12-04: V3.6.1 增加属性可修改图标大小
+ * 2024-08-26: V3.6.9 修复AutoSize在文字改变时未自动显示的问题，#IAKYX4
 ******************************************************************************/
 
 using System;
@@ -68,8 +69,8 @@ namespace Sunny.UI
             if (AutoSize && Dock == DockStyle.None)
             {
                 Size sf = TextRenderer.MeasureText(Text, Font);
-                int w = sf.Width + RadioButtonSize + 3;
-                int h = Math.Max(RadioButtonSize, sf.Height) + 2;
+                int w = sf.Width + RadioButtonSize + 7;
+                int h = Math.Max(RadioButtonSize, sf.Height) + 5;
                 if (Width != w) Width = w;
                 if (Height != h) Height = h;
             }
@@ -268,5 +269,11 @@ namespace Sunny.UI
             get => fillColor;
             set => SetFillColor(value);
         }
+
+        protected override void OnTextChanged(EventArgs e)
+        {
+            base.OnTextChanged(e);
+            Invalidate();
+        }
     }
 }
\ No newline at end of file