diff --git a/IDLImporter/IDLImporter.csproj b/IDLImporter/IDLImporter.csproj
index b37b407..b4b8cc9 100644
--- a/IDLImporter/IDLImporter.csproj
+++ b/IDLImporter/IDLImporter.csproj
@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Antlr2.Runtime.Patched" Version="2.7.7" />
     <PackageReference Include="Antlr2.Tools.Patched" Version="2.7.6.5" PrivateAssets="All" />
-    <PackageReference Include="GitVersion.MsBuild" Version="5.12.0" PrivateAssets="All" />
+    <PackageReference Include="GitVersion.MsBuild" Version="6.6.0" PrivateAssets="All" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="SIL.ReleaseTasks" Version="3.0.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
diff --git a/IDLImporterTests/IDLImporterTests.csproj b/IDLImporterTests/IDLImporterTests.csproj
index f5214d2..cfd68d8 100644
--- a/IDLImporterTests/IDLImporterTests.csproj
+++ b/IDLImporterTests/IDLImporterTests.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="GitVersion.MsBuild" Version="5.12.0" PrivateAssets="All" />
+    <PackageReference Include="GitVersion.MsBuild" Version="6.6.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="NUnit" Version="3.14.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
diff --git a/IdlImpTool/IDLImp.csproj b/IdlImpTool/IDLImp.csproj
index bf5607d..5519c7e 100644
--- a/IdlImpTool/IDLImp.csproj
+++ b/IdlImpTool/IDLImp.csproj
@@ -13,7 +13,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="GitVersion.MsBuild" Version="5.12.0" PrivateAssets="All" />
+    <PackageReference Include="GitVersion.MsBuild" Version="6.6.0" PrivateAssets="All" />
     <PackageReference Include="SIL.ReleaseTasks" Version="3.0.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
   </ItemGroup>