diff --git a/src/dotnet/RagePhoto.cs b/src/dotnet/RagePhoto.cs
index 8fc0b34..d3efbcf 100644
--- a/src/dotnet/RagePhoto.cs
+++ b/src/dotnet/RagePhoto.cs
@@ -16,10 +16,10 @@ namespace Syping.RagePhoto {
         [DllImport(_library)]
         private static extern void ragephoto_close(IntPtr instance);
         [DllImport(_library)]
-        [return: MarshalAs(UnmanagedType.Bool)]
+        [return: MarshalAs(UnmanagedType.I1)]
         private static extern bool ragephoto_load(IntPtr instance, Byte[] data, UIntPtr size);
         [DllImport(_library)]
-        [return: MarshalAs(UnmanagedType.Bool)]
+        [return: MarshalAs(UnmanagedType.I1)]
         private static extern bool ragephoto_loadfile(IntPtr instance, [MarshalAs(UnmanagedType.LPUTF8Str)] String filename);
         [DllImport(_library)]
         private static extern Int32 ragephoto_error(IntPtr instance);
@@ -46,16 +46,16 @@ namespace Syping.RagePhoto {
         [DllImport(_library)]
         private static extern UIntPtr ragephoto_getsavesizef(IntPtr instance, UInt32 photoFormat);
         [DllImport(_library)]
-        [return: MarshalAs(UnmanagedType.Bool)]
+        [return: MarshalAs(UnmanagedType.I1)]
         private static extern bool ragephoto_save(IntPtr instance, [Out] Byte[] data);
         [DllImport(_library)]
-        [return: MarshalAs(UnmanagedType.Bool)]
+        [return: MarshalAs(UnmanagedType.I1)]
         private static extern bool ragephoto_savef(IntPtr instance, [Out] Byte[] data, UInt32 photoFormat);
         [DllImport(_library)]
-        [return: MarshalAs(UnmanagedType.Bool)]
+        [return: MarshalAs(UnmanagedType.I1)]
         private static extern bool ragephoto_savefile(IntPtr instance, [MarshalAs(UnmanagedType.LPUTF8Str)] String filename);
         [DllImport(_library)]
-        [return: MarshalAs(UnmanagedType.Bool)]
+        [return: MarshalAs(UnmanagedType.I1)]
         private static extern bool ragephoto_savefilef(IntPtr instance, [MarshalAs(UnmanagedType.LPUTF8Str)] String filename, UInt32 photoFormat);
         [DllImport(_library)]
         private static extern void ragephoto_setbufferdefault(IntPtr instance);
@@ -66,7 +66,7 @@ namespace Syping.RagePhoto {
         [DllImport(_library)]
         private static extern void ragephoto_setphotoformat(IntPtr instance, UInt32 photoFormat);
         [DllImport(_library)]
-        [return: MarshalAs(UnmanagedType.Bool)]
+        [return: MarshalAs(UnmanagedType.I1)]
         private static extern bool ragephoto_setphotojpeg(IntPtr instance, Byte[] jpeg, UInt32 size, UInt32 bufferSize);
         [DllImport(_library)]
         private static extern void ragephoto_setphotojson(IntPtr instance, [MarshalAs(UnmanagedType.LPUTF8Str)] String json, UInt32 bufferSize);
diff --git a/src/dotnet/Syping.RagePhoto.Core.csproj b/src/dotnet/Syping.RagePhoto.Core.csproj
index bea75a7..efb636d 100644
--- a/src/dotnet/Syping.RagePhoto.Core.csproj
+++ b/src/dotnet/Syping.RagePhoto.Core.csproj
@@ -4,9 +4,9 @@
     <TargetFramework>netstandard2.1</TargetFramework>
     <AssemblyName>Syping.RagePhoto.Core</AssemblyName>
     <RootNamespace>Syping.RagePhoto</RootNamespace>
-    <Version>0.6.1.2</Version>
-    <AssemblyVersion>0.6.1.2</AssemblyVersion>
-    <FileVersion>0.6.1.2</FileVersion>
+    <Version>0.6.1.3</Version>
+    <AssemblyVersion>0.6.1.3</AssemblyVersion>
+    <FileVersion>0.6.1.3</FileVersion>
     <Authors>Syping</Authors>
     <Copyright>Copyright © 2025 Syping</Copyright>
     <Description>Open Source RAGE Photo Parser for GTA V and RDR 2</Description>