diff --git a/RamDrive.OsfMount/AssemblyInfo.cs b/RamDrive.OsfMount/AssemblyInfo.cs
index 9457d10..44357b0 100644
--- a/RamDrive.OsfMount/AssemblyInfo.cs
+++ b/RamDrive.OsfMount/AssemblyInfo.cs
@@ -9,5 +9,5 @@
 [assembly: ComVisible(false)]
 [assembly: Guid("4ce8b80c-b63b-497d-a43c-e4935562a516")]
 
-[assembly: AssemblyVersion("3.1.1001.3")]
-[assembly: AssemblyFileVersion("3.1.1001.3")]
+[assembly: AssemblyVersion("3.1.1001.4")]
+[assembly: AssemblyFileVersion("3.1.1001.4")]
diff --git a/RamDrive.OsfMount/RamDrive.OsfMount.csproj b/RamDrive.OsfMount/RamDrive.OsfMount.csproj
index d36ca12..ee18071 100644
--- a/RamDrive.OsfMount/RamDrive.OsfMount.csproj
+++ b/RamDrive.OsfMount/RamDrive.OsfMount.csproj
@@ -21,8 +21,8 @@
   </PropertyGroup>
 
   <PropertyGroup Label="NuGet">
-    <Version>3.1.1001.3</Version>
-    <PackageVersion>3.1.1001.3</PackageVersion>
+    <Version>3.1.1001.4</Version>
+    <PackageVersion>3.1.1001.4</PackageVersion>
     <Title>RamDrive.OsfMount</Title>
     <Authors>flexxxxer Aleksandr</Authors>
     <Description>A library for create virtual disk drive on system memory using (c) PassMark OSFMount software.</Description>
diff --git a/VERSION_HISTORY.md b/VERSION_HISTORY.md
index 158416c..aa7a724 100644
--- a/VERSION_HISTORY.md
+++ b/VERSION_HISTORY.md
@@ -7,7 +7,11 @@ The library is versioned as follows:
 whose binaries are included in the release of the library
 - library-patch - library patch number (bug fixes).
 
-## 3.1.1001.3, 2023-01-28
+## 3.1.1001.4, 2023-04-21
+New object-oriented API `RamDrive.OsfMount.ObjectOriented.RamDrive` and `OsfMountRamDrive.New` added.
+API changed: returned type of `OsfMountRamDrive.Mount` was `MountError`, now `OneOf<MountError, Drive>`.
+
+## 3.1.1001.3, 2023-04-8
 New `OsfMountRamDrive.AllRamDrives` API added (fixed).
 
 ## 3.1.1001.2 (initial release), 2023-01-28