diff --git a/Runtime/LwguiGradient/LwguiGradient.cs b/Runtime/LwguiGradient/LwguiGradient.cs
index 83b79bd..af7cdc1 100644
--- a/Runtime/LwguiGradient/LwguiGradient.cs
+++ b/Runtime/LwguiGradient/LwguiGradient.cs
@@ -115,6 +115,7 @@ public LwguiGradient(Color[] colors, float[] times)
 
         public void Clear(ChannelMask channelMask = ChannelMask.All)
         {
+            _curves ??= new List<AnimationCurve>();
             for (int c = 0; c < (int)Channel.Num; c++)
             {
                 if (!IsChannelIndexInMask(c, channelMask)) continue;
@@ -126,6 +127,7 @@ public void Clear(ChannelMask channelMask = ChannelMask.All)
         
         public void DeepCopyFrom(LwguiGradient src)
         {
+            _curves ??= new List<AnimationCurve>();
             for (int c = 0; c < (int)Channel.Num; c++)
             {
                 if (_curves.Count == c)
diff --git a/package.json b/package.json
index 2d53240..8987581 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.jasonma.lwgui",
-  "version": "1.18.4",
+  "version": "1.18.5",
   "displayName": "LWGUI",
   "description": "A Lightweight, Flexible, Powerful Shader GUI System for Unity.",
   "keywords": [