diff --git a/Samples/BuzzerTest/BuzzerTest.csproj b/Samples/BuzzerTest/BuzzerTest.csproj
index a585ed4..06a4610 100644
--- a/Samples/BuzzerTest/BuzzerTest.csproj
+++ b/Samples/BuzzerTest/BuzzerTest.csproj
@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.IoT" Version="2.3.2024.1203" />
+    <PackageReference Include="NewLife.IoT" Version="2.4.2024.1212" />
   </ItemGroup>
 
 </Project>
diff --git a/Samples/KeyTest/KeyTest.csproj b/Samples/KeyTest/KeyTest.csproj
index 0c7904e..8a2470d 100644
--- a/Samples/KeyTest/KeyTest.csproj
+++ b/Samples/KeyTest/KeyTest.csproj
@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.IoT" Version="2.3.2024.1203" />
+    <PackageReference Include="NewLife.IoT" Version="2.4.2024.1212" />
   </ItemGroup>
 
 </Project>
diff --git a/Samples/LedTest/LedTest.csproj b/Samples/LedTest/LedTest.csproj
index 8631dea..f1ddb27 100644
--- a/Samples/LedTest/LedTest.csproj
+++ b/Samples/LedTest/LedTest.csproj
@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.IoT" Version="2.3.2024.1203" />
+    <PackageReference Include="NewLife.IoT" Version="2.4.2024.1212" />
   </ItemGroup>
 
 </Project>
diff --git a/Samples/SerialTest/SerialTest.csproj b/Samples/SerialTest/SerialTest.csproj
index 33cce29..79b40a3 100644
--- a/Samples/SerialTest/SerialTest.csproj
+++ b/Samples/SerialTest/SerialTest.csproj
@@ -18,7 +18,7 @@
 
   <ItemGroup>
     <PackageReference Include="NewLife.Core" Version="11.1.2024.1206" />
-    <PackageReference Include="NewLife.IoT" Version="2.3.2024.1203" />
+    <PackageReference Include="NewLife.IoT" Version="2.4.2024.1212" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Samples/UsbPowerTest/UsbPowerTest.csproj b/Samples/UsbPowerTest/UsbPowerTest.csproj
index 32ea35e..50206bd 100644
--- a/Samples/UsbPowerTest/UsbPowerTest.csproj
+++ b/Samples/UsbPowerTest/UsbPowerTest.csproj
@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.IoT" Version="2.3.2024.1203" />
+    <PackageReference Include="NewLife.IoT" Version="2.4.2024.1212" />
   </ItemGroup>
 
 </Project>
diff --git a/SmartA2/SmartA2.csproj b/SmartA2/SmartA2.csproj
index 94bbb4e..1be67c1 100644
--- a/SmartA2/SmartA2.csproj
+++ b/SmartA2/SmartA2.csproj
@@ -49,7 +49,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.IoT" Version="2.3.2024.1203" />
+    <PackageReference Include="NewLife.IoT" Version="2.4.2024.1212" />
     <PackageReference Include="NewLife.ModbusRTU" Version="1.8.2024.217" />
   </ItemGroup>