diff --git a/TetraPackOCR/TetraPackOCR.csproj b/TetraPackOCR/TetraPackOCR.csproj
index 6baf11d..311777a 100644
--- a/TetraPackOCR/TetraPackOCR.csproj
+++ b/TetraPackOCR/TetraPackOCR.csproj
@@ -123,8 +123,8 @@
     <Reference Include="OpenCvSharp.Extensions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6adad1e807fea099, processorArchitecture=MSIL">
       <HintPath>..\packages\OpenCvSharp4.Extensions.4.11.0.20250507\lib\netstandard2.0\OpenCvSharp.Extensions.dll</HintPath>
     </Reference>
-    <Reference Include="PaddleOCRSharp, Version=6.0.1.0, Culture=neutral, processorArchitecture=AMD64">
-      <HintPath>..\packages\PaddleOCRSharp.6.0.1\lib\net47\PaddleOCRSharp.dll</HintPath>
+    <Reference Include="PaddleOCRSharp, Version=5.1.0.0, Culture=neutral, processorArchitecture=AMD64">
+      <HintPath>..\packages\PaddleOCRSharp.5.1.0\lib\net47\PaddleOCRSharp.dll</HintPath>
     </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
@@ -252,9 +252,9 @@
     <Error Condition="!Exists('..\packages\System.ValueTuple.4.6.1\build\net471\System.ValueTuple.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\System.ValueTuple.4.6.1\build\net471\System.ValueTuple.targets'))" />
     <Error Condition="!Exists('..\packages\OpenCvSharp4.runtime.win.4.11.0.20250507\build\netstandard\OpenCvSharp4.runtime.win.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\OpenCvSharp4.runtime.win.4.11.0.20250507\build\netstandard\OpenCvSharp4.runtime.win.props'))" />
     <Error Condition="!Exists('..\packages\Paddle.Runtime.win_x64.3.2.2\build\Paddle.Runtime.win_x64.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Paddle.Runtime.win_x64.3.2.2\build\Paddle.Runtime.win_x64.targets'))" />
-    <Error Condition="!Exists('..\packages\PaddleOCRSharp.6.0.1\build\PaddleOCRSharp.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\PaddleOCRSharp.6.0.1\build\PaddleOCRSharp.targets'))" />
+    <Error Condition="!Exists('..\packages\PaddleOCRSharp.5.1.0\build\PaddleOCRSharp.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\PaddleOCRSharp.5.1.0\build\PaddleOCRSharp.targets'))" />
   </Target>
   <Import Project="..\packages\System.ValueTuple.4.6.1\build\net471\System.ValueTuple.targets" Condition="Exists('..\packages\System.ValueTuple.4.6.1\build\net471\System.ValueTuple.targets')" />
   <Import Project="..\packages\Paddle.Runtime.win_x64.3.2.2\build\Paddle.Runtime.win_x64.targets" Condition="Exists('..\packages\Paddle.Runtime.win_x64.3.2.2\build\Paddle.Runtime.win_x64.targets')" />
-  <Import Project="..\packages\PaddleOCRSharp.6.0.1\build\PaddleOCRSharp.targets" Condition="Exists('..\packages\PaddleOCRSharp.6.0.1\build\PaddleOCRSharp.targets')" />
+  <Import Project="..\packages\PaddleOCRSharp.5.1.0\build\PaddleOCRSharp.targets" Condition="Exists('..\packages\PaddleOCRSharp.5.1.0\build\PaddleOCRSharp.targets')" />
 </Project>
\ No newline at end of file
diff --git a/TetraPackOCR/packages.config b/TetraPackOCR/packages.config
index cc55866..0bd6941 100644
--- a/TetraPackOCR/packages.config
+++ b/TetraPackOCR/packages.config
@@ -5,7 +5,7 @@
   <package id="OpenCvSharp4.Extensions" version="4.11.0.20250507" targetFramework="net472" />
   <package id="OpenCvSharp4.runtime.win" version="4.11.0.20250507" targetFramework="net472" />
   <package id="Paddle.Runtime.win_x64" version="3.2.2" targetFramework="net472" />
-  <package id="PaddleOCRSharp" version="6.0.1" targetFramework="net472" />
+  <package id="PaddleOCRSharp" version="5.1.0" targetFramework="net472" />
   <package id="System.Buffers" version="4.6.1" targetFramework="net472" />
   <package id="System.Drawing.Common" version="10.0.1" targetFramework="net472" />
   <package id="System.Memory" version="4.6.3" targetFramework="net472" />