diff --git a/.gitignore b/.gitignore
index 51ec6219235..6a1acc0a024 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,3 +30,5 @@ coverage/
 spoom_data/
 spoom_report.html
 .vs/
+# Ignore VSCode C# Dev Kit
+**/.mono/**/values.xml
diff --git a/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Updater/LockFileUpdater.cs b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Updater/LockFileUpdater.cs
new file mode 100644
index 00000000000..0661665712d
--- /dev/null
+++ b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Updater/LockFileUpdater.cs
@@ -0,0 +1,28 @@
+namespace NuGetUpdater.Core;
+
+internal static class LockFileUpdater
+{
+    public static async Task UpdateLockFileAsync(
+        string repoRootPath,
+        string projectPath,
+        Logger logger)
+    {
+        var projectDirectory = Path.GetDirectoryName(projectPath);
+        var lockPath = Path.Combine(projectDirectory, "packages.lock.json");
+        logger.Log($"    Updating lock file");
+        if (!File.Exists(lockPath))
+        {
+            logger.Log($"      File [{Path.GetRelativePath(repoRootPath, lockPath)}] does not exist.");
+            return;
+        }
+
+        await MSBuildHelper.SidelineGlobalJsonAsync(projectDirectory, repoRootPath, async () =>
+        {
+            var (exitCode, stdout, stderr) = await ProcessEx.RunAsync("dotnet", $"restore --force-evaluate {projectPath}", workingDirectory: projectDirectory);
+            if (exitCode != 0)
+            {
+                logger.Log($"      Lock file update failed.\nSTDOUT:\n{stdout}\nSTDERR:\n{stderr}");
+            }
+        }, retainMSBuildSdks: true);
+    }
+}
diff --git a/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Updater/UpdaterWorker.cs b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Updater/UpdaterWorker.cs
index 3c6e6eb27cf..c348d30a0f6 100644
--- a/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Updater/UpdaterWorker.cs
+++ b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Updater/UpdaterWorker.cs
@@ -189,5 +189,11 @@ private async Task RunUpdaterAsync(
 
         // Some repos use a mix of packages.config and PackageReference
         await SdkPackageUpdater.UpdateDependencyAsync(repoRootPath, projectPath, dependencyName, previousDependencyVersion, newDependencyVersion, isTransitive, _logger);
+
+        // Update lock file if exists
+        if (File.Exists(Path.Combine(Path.GetDirectoryName(projectPath), "packages.lock.json")))
+        {
+            await LockFileUpdater.UpdateLockFileAsync(repoRootPath, projectPath, _logger);
+        }
     }
 }
diff --git a/nuget/lib/dependabot/nuget/file_fetcher.rb b/nuget/lib/dependabot/nuget/file_fetcher.rb
index c8993a8e0f6..331b0a32c04 100644
--- a/nuget/lib/dependabot/nuget/file_fetcher.rb
+++ b/nuget/lib/dependabot/nuget/file_fetcher.rb
@@ -52,6 +52,7 @@ def initialize(source:, credentials:, repo_contents_path: nil, options: {})
         @nuget_config_files = T.let(nil, T.nilable(T::Array[Dependabot::DependencyFile]))
         @packages_config_files = T.let(nil, T.nilable(T::Array[Dependabot::DependencyFile]))
         @assembly_binding_redirect_config_files = T.let(nil, T.nilable(T::Array[Dependabot::DependencyFile]))
+        @packages_lock_files = T.let(nil, T.nilable(T::Array[Dependabot::DependencyFile]))
       end
 
       sig { override.returns(T::Array[DependencyFile]) }
@@ -63,6 +64,7 @@ def fetch_files
           *packages_config_files,
           *assembly_binding_redirect_config_files,
           *nuget_config_files,
+          *packages_lock_files,
           global_json,
           dotnet_tools_json,
           packages_props
@@ -266,6 +268,21 @@ def nuget_config_files
         @nuget_config_files
       end
 
+      sig { returns(T::Array[Dependabot::DependencyFile]) }
+      def packages_lock_files
+        return @packages_lock_files if @packages_lock_files
+
+        candidate_paths =
+          [*project_files.map { |f| File.dirname(f.name) }, "."].uniq
+
+        @packages_lock_files =
+          candidate_paths.filter_map do |dir|
+            file = repo_contents(dir: dir)
+                   .find { |f| f.name.casecmp("packages.lock.json").zero? }
+            fetch_file_from_host(File.join(dir, file.name)) if file
+          end
+      end
+
       sig do
         params(
           project_file: Dependabot::DependencyFile,