diff --git a/ArcFormats/Properties/AssemblyInfo.cs b/ArcFormats/Properties/AssemblyInfo.cs
index 67e2501f..3287c38f 100644
--- a/ArcFormats/Properties/AssemblyInfo.cs
+++ b/ArcFormats/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion ("1.0.2.0")]
-[assembly: AssemblyFileVersion ("1.0.2.0")]
+[assembly: AssemblyVersion ("1.0.2.20")]
+[assembly: AssemblyFileVersion ("1.0.2.20")]
diff --git a/GARbro.GUI.csproj b/GARbro.GUI.csproj
index 01222f28..a532d932 100644
--- a/GARbro.GUI.csproj
+++ b/GARbro.GUI.csproj
@@ -316,6 +316,9 @@
     </BootstrapperPackage>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <PropertyGroup>
+    <PreBuildEvent>perl "$(SolutionDir)inc-revision.pl" "$(ProjectPath)" $(ConfigurationName)</PreBuildEvent>
+  </PropertyGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/GameRes/GameRes.csproj b/GameRes/GameRes.csproj
index 6ee428db..310d959a 100644
--- a/GameRes/GameRes.csproj
+++ b/GameRes/GameRes.csproj
@@ -79,6 +79,9 @@
     <EmbeddedResource Include="Strings\garStrings.ru-RU.resx" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <PropertyGroup>
+    <PreBuildEvent>perl "$(SolutionDir)inc-revision.pl" "$(ProjectPath)" $(ConfigurationName)</PreBuildEvent>
+  </PropertyGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/GameRes/Properties/AssemblyInfo.cs b/GameRes/Properties/AssemblyInfo.cs
index 2d6f0c2d..4e63e492 100644
--- a/GameRes/Properties/AssemblyInfo.cs
+++ b/GameRes/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
+[assembly: AssemblyVersion ("1.0.0.3")]
+[assembly: AssemblyFileVersion ("1.0.0.3")]
diff --git a/Properties/AssemblyInfo.cs b/Properties/AssemblyInfo.cs
index 915df835..9c495a35 100644
--- a/Properties/AssemblyInfo.cs
+++ b/Properties/AssemblyInfo.cs
@@ -51,5 +51,5 @@ using System.Windows;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion ("1.0.2.0")]
-[assembly: AssemblyFileVersion ("1.0.1.0")]
+[assembly: AssemblyVersion ("1.0.2.10")]
+[assembly: AssemblyFileVersion ("1.0.1.10")]
diff --git a/inc-revision.pl b/inc-revision.pl
new file mode 100644
index 00000000..4fc45ff5
--- /dev/null
+++ b/inc-revision.pl
@@ -0,0 +1,70 @@
+#!/usr/bin/perl
+#
+# increment .Net assembly revision
+
+use strict;
+use Win32;
+use File::Basename;
+use File::Spec;
+use File::Temp;
+
+sub get_git_exe {
+    my $user_app_data = Win32::GetFolderPath (Win32::CSIDL_LOCAL_APPDATA);
+    my $git_glob = File::Spec->catfile ($user_app_data, 'GitHub', 'PortableGit_*', 'bin', 'git.exe');
+    my $git_path = glob ($git_glob);
+    die "PortableGit not found\n" unless -x $git_path;
+    return $git_path;
+}
+
+sub match_version {
+    return $_[0] =~ /^(\d+)\.(\d+)(?:\.(\d+)\.(\d+))?/;
+}
+
+unless (1 == $#ARGV) {
+    print "usage: inc-revision.pl PROJECT-FILE CONFIG\n";
+    exit 0;
+}
+
+my ($project_path, $config) = @ARGV;
+my $project_dir = dirname ($project_path);
+my $project_file = basename ($project_path);
+my $is_release = 'release' eq lc $config;
+chdir $project_dir or die "$project_dir: $!\n";
+
+my $git_exe = get_git_exe;
+my $prop_dir = File::Spec->catfile ('.', 'Properties');
+my $assembly_info = File::Spec->catfile ($prop_dir, 'AssemblyInfo.cs');
+my $revision = `$git_exe rev-list master --count $project_file`;
+die "git.exe failed\n" if $? != 0;
+chomp $revision;
+
+my $version_changed = 0;
+my $tmp_filename;
+{
+    open (my $assembly_file, '<', $assembly_info) or die "${assembly_info}: $!";
+    my $tmp_output = File::Temp->new (DIR => $prop_dir, UNLINK => 0);
+    $tmp_filename = $tmp_output->filename;
+    binmode ($tmp_output, ':crlf');
+
+    while (<$assembly_file>) {
+        m,^//, and next;
+        /^\[assembly:\s*(Assembly(?:File)?Version)\s*\("(.*?)"\)\]/ and do {
+            my ($attr, $version) = ($1, $2);
+            my ($major, $minor, $build, $rev) = match_version ($version);
+            $build += 1 if $is_release;
+            my $new_version = "${major}.${minor}.${build}.${revision}";
+            $_ = "[assembly: ${attr} (\"${new_version}\")]\n";
+            print "AssemblyVersion: $new_version\n" if $attr eq 'AssemblyVersion';
+            $version_changed ||= $version ne $new_version;
+        };
+    } continue {
+        print $tmp_output $_;
+    }
+}
+
+if ($version_changed) {
+    rename $assembly_info, "${assembly_info}~" or die "${assembly_info}: $!";
+    rename $tmp_filename, $assembly_info or die "${tmp_filename}: $!";
+} else {
+    unlink $tmp_filename;
+}