diff --git a/src/GitVersionTask/build/GitVersionTask.props b/src/GitVersionTask/build/GitVersionTask.props
index 9c0c55a30b..1f05cd57b6 100644
--- a/src/GitVersionTask/build/GitVersionTask.props
+++ b/src/GitVersionTask/build/GitVersionTask.props
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <PropertyGroup>
         <GitVersionAssemblyFile Condition="$(GitVersionAssemblyFile) == '' And '$(MSBuildRuntimeType)' != 'Core'">$(MSBuildThisFileDirectory)..\tools\net472\GitVersionTask.MsBuild.dll</GitVersionAssemblyFile>
         <GitVersionAssemblyFile Condition="$(GitVersionAssemblyFile) == '' And '$(MSBuildRuntimeType)' == 'Core'">$(MSBuildThisFileDirectory)..\tools\netstandard2.0\GitVersionTask.MsBuild.dll</GitVersionAssemblyFile>
diff --git a/src/GitVersionTask/build/GitVersionTask.targets b/src/GitVersionTask/build/GitVersionTask.targets
index 5ca53bfe64..e9dbe30368 100644
--- a/src/GitVersionTask/build/GitVersionTask.targets
+++ b/src/GitVersionTask/build/GitVersionTask.targets
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <UsingTask TaskName="GetVersion" AssemblyFile="$(GitVersionAssemblyFile)"/>
     <UsingTask TaskName="GenerateGitVersionInformation" AssemblyFile="$(GitVersionAssemblyFile)"/>
     <UsingTask TaskName="UpdateAssemblyInfo" AssemblyFile="$(GitVersionAssemblyFile)" />
diff --git a/src/GitVersionTask/buildMultiTargeting/GitVersionTask.props b/src/GitVersionTask/buildMultiTargeting/GitVersionTask.props
index 38b3a09ab9..611b49a97a 100644
--- a/src/GitVersionTask/buildMultiTargeting/GitVersionTask.props
+++ b/src/GitVersionTask/buildMultiTargeting/GitVersionTask.props
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <Import Project="$(MSBuildThisFileDirectory)..\build\$(MSBuildThisFile)"/>
 </Project>
diff --git a/src/GitVersionTask/buildMultiTargeting/GitVersionTask.targets b/src/GitVersionTask/buildMultiTargeting/GitVersionTask.targets
index 2448f12d00..1b655b455e 100644
--- a/src/GitVersionTask/buildMultiTargeting/GitVersionTask.targets
+++ b/src/GitVersionTask/buildMultiTargeting/GitVersionTask.targets
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <UsingTask TaskName="GetVersion" AssemblyFile="$(GitVersionAssemblyFile)"/>
     <UsingTask TaskName="WriteVersionInfoToBuildLog" AssemblyFile="$(GitVersionAssemblyFile)" />