diff --git a/LinqToLdap.Tests/LinqToLdap.Tests.csproj b/LinqToLdap.Tests/LinqToLdap.Tests.csproj
index 1d08709..f77f601 100644
--- a/LinqToLdap.Tests/LinqToLdap.Tests.csproj
+++ b/LinqToLdap.Tests/LinqToLdap.Tests.csproj
@@ -17,7 +17,7 @@
     <PackageReference Include="Moq" Version="4.14.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.1.2" />
     <PackageReference Include="MSTest.TestFramework" Version="2.1.2" />
-    <PackageReference Include="System.DirectoryServices.Protocols" Version="4.7.0" />
+    <PackageReference Include="System.DirectoryServices.Protocols" Version="5.0.1" />
     <PackageReference Include="SharpTestsEx" Version="2.0.0" />
   </ItemGroup>
 
diff --git a/LinqToLdap/LinqToLdap.csproj b/LinqToLdap/LinqToLdap.csproj
index 9c1fe37..5f05164 100644
--- a/LinqToLdap/LinqToLdap.csproj
+++ b/LinqToLdap/LinqToLdap.csproj
@@ -25,7 +25,7 @@
   </PropertyGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' != 'net35' AND '$(TargetFramework)' != 'net40' ">
-    <PackageReference Include="System.DirectoryServices.Protocols" Version="4.7.0" />
+    <PackageReference Include="System.DirectoryServices.Protocols" Version="5.0.1" />
     <PackageReference Include="System.Reflection.Emit.ILGeneration" Version="4.7.0" />
     <PackageReference Include="System.Reflection.Emit.LightWeight" Version="4.7.0" />
   </ItemGroup>