diff --git a/SchemeTool/App.config b/SchemeTool/App.config
index e4fdcdf7..18d3b8dd 100644
--- a/SchemeTool/App.config
+++ b/SchemeTool/App.config
@@ -7,7 +7,7 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
diff --git a/SchemeTool/SchemeTool.csproj b/SchemeTool/SchemeTool.csproj
index 5c608b4d..11b6fa29 100644
--- a/SchemeTool/SchemeTool.csproj
+++ b/SchemeTool/SchemeTool.csproj
@@ -45,8 +45,8 @@
     <Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
     </Reference>
-    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.6.0.0\lib\net461\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.5.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.4.6.0\lib\netstandard2.0\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
     </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
diff --git a/SchemeTool/packages.config b/SchemeTool/packages.config
index 22be3061..5324bbbe 100644
--- a/SchemeTool/packages.config
+++ b/SchemeTool/packages.config
@@ -3,5 +3,5 @@
   <package id="System.Buffers" version="4.5.1" targetFramework="net461" />
   <package id="System.Memory" version="4.5.4" targetFramework="net461" />
   <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net461" />
-  <package id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" targetFramework="net461" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="4.6.0" targetFramework="net461" />
 </packages>
\ No newline at end of file