diff --git a/Directory.Build.props b/Directory.Build.props
index 68b6c22f..8037a9a8 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -25,8 +25,8 @@ See full changelog at https://github.com/sillsdev/SIL.BuildTasks/blob/master/CHA
   </ItemGroup>
 
     <ItemGroup>
-    <PackageReference Include="GitVersion.MsBuild" Version="5.10.3" PrivateAssets="All" />
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
+    <PackageReference Include="GitVersion.MsBuild" Version="6.7.0" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.201" PrivateAssets="All" />
   </ItemGroup>
 
 </Project>
\ No newline at end of file
diff --git a/RecreateGuidDatabase/RecreateGuidDatabase.csproj b/RecreateGuidDatabase/RecreateGuidDatabase.csproj
index c817ace4..eaf207f8 100644
--- a/RecreateGuidDatabase/RecreateGuidDatabase.csproj
+++ b/RecreateGuidDatabase/RecreateGuidDatabase.csproj
@@ -7,8 +7,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Markdig.Signed" Version="0.41.1" />
-    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.28" />
+    <PackageReference Include="Markdig.Signed" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="18.4.0" />
     <PackageReference Include="SIL.ReleaseTasks.Dogfood" Version="[2.3.3-*,)" PrivateAssets="All" />
   </ItemGroup>
 </Project>
diff --git a/SIL.BuildTasks.AWS/SIL.BuildTasks.AWS.csproj b/SIL.BuildTasks.AWS/SIL.BuildTasks.AWS.csproj
index b500ee6a..220c5725 100644
--- a/SIL.BuildTasks.AWS/SIL.BuildTasks.AWS.csproj
+++ b/SIL.BuildTasks.AWS/SIL.BuildTasks.AWS.csproj
@@ -8,11 +8,11 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="AWSSDK.S3" Version="3.3.110.50" IncludeAssets="All" PrivateAssets="All" />
-    <PackageReference Include="JetBrains.Annotations" Version="2024.3.0">
+    <PackageReference Include="JetBrains.Annotations" Version="2025.2.4">
       <PrivateAssets>All</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Markdig.Signed" Version="0.41.1" />
-    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.28" />
+    <PackageReference Include="Markdig.Signed" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="18.4.0" />
     <PackageReference Include="SIL.ReleaseTasks.Dogfood" Version="[2.3.3-*,)" PrivateAssets="All" />
   </ItemGroup>
   <!-- Collect all dependencies and include them in the package itself, next to the Task assembly. -->
diff --git a/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.Helper/SIL.BuildTasks.Tests.Helper.csproj b/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.Helper/SIL.BuildTasks.Tests.Helper.csproj
index 2e4eb186..1d68f118 100644
--- a/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.Helper/SIL.BuildTasks.Tests.Helper.csproj
+++ b/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.Helper/SIL.BuildTasks.Tests.Helper.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
   <ItemGroup>
     <!-- Don't update NUnit to 3.x - that'll require refactoring the NUnitTests fixture! -->
-    <PackageReference Include="NUnit" Version="2.6.5" />
+    <PackageReference Include="NUnit" Version="4.3.2" />
   </ItemGroup>
   <ItemGroup>
     <Compile Remove="ForceCrash\**" />
diff --git a/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.csproj b/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.csproj
index 92d79e3b..baab6e9b 100644
--- a/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.csproj
+++ b/SIL.BuildTasks.Tests/SIL.BuildTasks.Tests.csproj
@@ -11,19 +11,19 @@
     <Reference Include="Microsoft.Build.Utilities.v4.0" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="JetBrains.Annotations" Version="2024.3.0">
+    <PackageReference Include="JetBrains.Annotations" Version="2025.2.4">
       <PrivateAssets>All</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.28" />
-    <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.14.28" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.0" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="18.4.0" />
+    <PackageReference Include="Microsoft.Build.Utilities.Core" Version="18.4.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="NUnit" Version="4.3.2" />
     <PackageReference Include="NUnit.ConsoleRunner" Version="3.20.0" />
     <!-- Don't remove NUnit.Runners.Net4 - this is needed for the NUnitTests fixture! -->
     <PackageReference Include="NUnit.Runners.Net4" Version="2.6.4" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
-    <PackageReference Include="SIL.TestUtilities" Version="7.0.0" />
+    <PackageReference Include="SIL.TestUtilities" Version="17.0.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\SIL.BuildTasks\SIL.BuildTasks.csproj" />
diff --git a/SIL.BuildTasks/SIL.BuildTasks.csproj b/SIL.BuildTasks/SIL.BuildTasks.csproj
index 21e9428d..8bb4e799 100644
--- a/SIL.BuildTasks/SIL.BuildTasks.csproj
+++ b/SIL.BuildTasks/SIL.BuildTasks.csproj
@@ -7,12 +7,12 @@
     <IsTool>true</IsTool>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="JetBrains.Annotations" Version="2024.3.0">
+    <PackageReference Include="JetBrains.Annotations" Version="2025.2.4">
       <PrivateAssets>All</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Markdig.Signed" Version="0.41.1" />
-    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.28" />
-    <PackageReference Include="SIL.Core" Version="7.0.0" />
+    <PackageReference Include="Markdig.Signed" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="18.4.0" />
+    <PackageReference Include="SIL.Core" Version="17.0.0" />
     <PackageReference Include="SIL.ReleaseTasks.Dogfood" Version="[2.3.3-*,)" PrivateAssets="All" />
   </ItemGroup>
   <ItemGroup>
diff --git a/SIL.ReleaseTasks.Dogfood/SIL.ReleaseTasks.Dogfood.csproj b/SIL.ReleaseTasks.Dogfood/SIL.ReleaseTasks.Dogfood.csproj
index 255261c0..a41d652c 100644
--- a/SIL.ReleaseTasks.Dogfood/SIL.ReleaseTasks.Dogfood.csproj
+++ b/SIL.ReleaseTasks.Dogfood/SIL.ReleaseTasks.Dogfood.csproj
@@ -14,11 +14,11 @@
     </Compile>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="JetBrains.Annotations" Version="2024.3.0">
+    <PackageReference Include="JetBrains.Annotations" Version="2025.2.4">
       <PrivateAssets>All</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Markdig.Signed" Version="0.41.1" />
-    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.28" />
+    <PackageReference Include="Markdig.Signed" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="18.4.0" />
   </ItemGroup>
   <Import Project="..\SIL.ReleaseTasks\SIL.ReleaseTasks.Common.inc" />
 </Project>
diff --git a/SIL.ReleaseTasks.Tests/SIL.ReleaseTasks.Tests.csproj b/SIL.ReleaseTasks.Tests/SIL.ReleaseTasks.Tests.csproj
index 0a79d043..9c811cfd 100644
--- a/SIL.ReleaseTasks.Tests/SIL.ReleaseTasks.Tests.csproj
+++ b/SIL.ReleaseTasks.Tests/SIL.ReleaseTasks.Tests.csproj
@@ -10,9 +10,9 @@
     <Reference Include="Microsoft.Build.Framework" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Markdig.Signed" Version="0.41.1" />
-    <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.14.28" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.0" />
+    <PackageReference Include="Markdig.Signed" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Build.Utilities.Core" Version="18.4.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageReference Include="NUnit" Version="4.3.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>
diff --git a/SIL.ReleaseTasks/SIL.ReleaseTasks.csproj b/SIL.ReleaseTasks/SIL.ReleaseTasks.csproj
index a28fdf5d..74ca70b7 100644
--- a/SIL.ReleaseTasks/SIL.ReleaseTasks.csproj
+++ b/SIL.ReleaseTasks/SIL.ReleaseTasks.csproj
@@ -7,11 +7,11 @@
     <PackageReadmeFile>SIL.ReleaseTasks.md</PackageReadmeFile>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="JetBrains.Annotations" Version="2024.3.0">
+    <PackageReference Include="JetBrains.Annotations" Version="2025.2.4">
       <PrivateAssets>All</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Markdig.Signed" Version="0.41.1" />
-    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.28" />
+    <PackageReference Include="Markdig.Signed" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="18.4.0" />
     <PackageReference Include="SIL.ReleaseTasks.Dogfood" Version="[2.3.3-*,)" PrivateAssets="All" />
   </ItemGroup>
   <Import Project="SIL.ReleaseTasks.Common.inc" />