diff --git a/ILRepack.Lib.MSBuild.Task/ILRepack.Lib.MSBuild.Task.csproj b/ILRepack.Lib.MSBuild.Task/ILRepack.Lib.MSBuild.Task.csproj
index a37722d..4a3fbbd 100644
--- a/ILRepack.Lib.MSBuild.Task/ILRepack.Lib.MSBuild.Task.csproj
+++ b/ILRepack.Lib.MSBuild.Task/ILRepack.Lib.MSBuild.Task.csproj
@@ -2,12 +2,12 @@
 
     <PropertyGroup>
         <TargetFramework>net472</TargetFramework>
-        <Version>2.0.26</Version>
+        <Version>2.0.29</Version>
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="ILRepack" Version="2.0.26" GeneratePathProperty="true"/>
-        <PackageReference Include="ILRepack.Lib" Version="2.0.26"/>
+        <PackageReference Include="ILRepack" Version="2.0.29" GeneratePathProperty="true"/>
+        <PackageReference Include="ILRepack.Lib" Version="2.0.29"/>
         <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.8.3"/>
     </ItemGroup>
 
diff --git a/ILRepack.Lib.MSBuild.Task/ILRepack.cs b/ILRepack.Lib.MSBuild.Task/ILRepack.cs
index 7d703a7..ef41287 100644
--- a/ILRepack.Lib.MSBuild.Task/ILRepack.cs
+++ b/ILRepack.Lib.MSBuild.Task/ILRepack.cs
@@ -143,6 +143,11 @@ public virtual string TargetKind
         /// </summary>
         public virtual ITaskItem[] InternalizeExclude { get; set; }
 
+        /// <summary>
+        ///     List of specific assemblies to internalize.
+        /// </summary>
+        public virtual ITaskItem[] InternalizeAssembly { get; set; }
+
         /// <summary>
         ///     Output name for the merged assembly.
         /// </summary>
@@ -321,6 +326,11 @@ public override bool Execute()
 
                 repackOptions.InputAssemblies = assemblies;
 
+                if (InternalizeAssembly != null && InternalizeAssembly.Any())
+                {
+                    repackOptions.InternalizeAssemblies = InternalizeAssembly.Select(i => StripExtension(i.ItemSpec)).ToArray();
+                }
+
                 // Path that will be used when searching for assemblies to merge.
                 var searchPath = new List<string> { "." };
                 searchPath.AddRange(LibraryPath.Select(iti => BuildPath(iti.ItemSpec)));
@@ -393,6 +403,26 @@ private static string BuildPath(string path)
             return string.IsNullOrEmpty(path) ? null : Path.Combine(workDir, path);
         }
 
+        /// <summary>
+        ///     Strips .dll or .exe extension from filePath if present.
+        /// </summary>
+        /// <param name="filePath">File path</param>
+        /// <returns>File path without the extension.</returns>
+        private static string StripExtension(string filePath)
+        {
+            if (filePath == null)
+            {
+                return null;
+            }
+
+            if (filePath.EndsWith(".dll", StringComparison.OrdinalIgnoreCase) || filePath.EndsWith(".exe", StringComparison.OrdinalIgnoreCase))
+            {
+                filePath = filePath.Substring(0, filePath.Length - 4);
+            }
+
+            return filePath;
+        }
+
         #endregion
 
         #region IDisposable
diff --git a/ILRepack.Lib.MSBuild.Task/build/ILRepack.Lib.MSBuild.Task.nuspec b/ILRepack.Lib.MSBuild.Task/build/ILRepack.Lib.MSBuild.Task.nuspec
index 2816323..d92ca75 100644
--- a/ILRepack.Lib.MSBuild.Task/build/ILRepack.Lib.MSBuild.Task.nuspec
+++ b/ILRepack.Lib.MSBuild.Task/build/ILRepack.Lib.MSBuild.Task.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
     <metadata>
         <id>ILRepack.Lib.MSBuild.Task</id>
-        <version>2.0.26</version>
+        <version>2.0.29</version>
         <title>ILRepack.Lib.MSBuild.Task</title>
         <authors>RBSoft</authors>
         <owners>rbsoft</owners>
diff --git a/README.md b/README.md
index a7d5882..81bac5c 100644
--- a/README.md
+++ b/README.md
@@ -107,6 +107,7 @@ You can turn this functionality off by setting ClearOutputDirectory to False as
 | XmlDocumentation               | Merge assembly XML documentation.                                                                                                                          |
 | LibraryPath                    | List of paths to use as "include directories" when attempting to merge assemblies.                                                                         |
 | Internalize                    | Set all types but the ones from the first assembly 'internal'.                                                                                             |
+| InternalizeAssembly            | Internalize only specific assemblies (list of assembly names without path or extension).                                                                   |
 | RenameInternalized             | Rename all internalized types (to be used when Internalize is enabled).                                                                                    |
 | ExcludeInternalizeSerializable | Do not internalize types marked as Serializable.                                                                                                           |
 | InternalizeExclude             | If Internalize is set to true, any which match these regular expressions will not be internalized. If Internalize is false, then this property is ignored. |
diff --git a/appveyor.yml b/appveyor.yml
index a931433..2d2f2bb 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
-version: 2.0.26.{build}
+version: 2.0.29.{build}
 environment:
-  my_version: 2.0.26
+  my_version: 2.0.29
   my_secret:
     secure: 5qtuEW0UQ/IEO8DRi4/y3EgEBoJDM/HyYpPgzasIlm0=
 skip_branch_with_pr: true