diff --git a/update/bump-version.ps1 b/update/bump-version.ps1
new file mode 100644
index 000000000..9e0a5093b
--- /dev/null
+++ b/update/bump-version.ps1
@@ -0,0 +1,161 @@
+param( [string]$tag, [switch]$updatelog)
+# -tag [new_tag], new tag shall be in format ^\d+\.\d+\.\d+$ and greater than
+# the current one
+# -updatelog update CHANGELOG.md if this switch used
+
+# get old version info from file, esp from build.bat
+function get_old_version{
+  param ([string]$filePath)
+  $fileContent = Get-Content -Path $filePath;
+  $version = @{};
+  foreach ($line in $fileContent) {
+    if ($version["major"] -eq $null -and $line -match 'VERSION_MAJOR=(\d+)') {
+      $version["major"] = $matches[1];
+    }
+    if ($version["minor"] -eq $null -and $line -match 'VERSION_MINOR=(\d+)') {
+      $version["minor"] = $matches[1];
+    }
+    if ($version["patch"] -eq $null -and $line -match 'VERSION_PATCH=(\d+)') {
+      $version["patch"] = $matches[1];
+    }
+    if ($version["major"] -ne $null -and $version["minor"] -ne $null -and $version["patch"] -ne $null) {
+      break;
+    }
+  }
+  $version['str'] = $version["major"] + "." + $version["minor"] + "." + $version["patch"];
+  return $version;
+}
+
+# parse new version info
+function parse_new_version {
+  param([string]$new_version)
+  $version = @{};
+  if ($new_version -match "^(\d+)\.(\d+)\.(\d+)$") {
+    $version['major'] = $matches[1];
+    $version['minor'] = $matches[2];
+    $version['patch'] = $matches[3];
+  }
+  return $version;
+}
+
+# update bat file with param filePath, and tags 
+function update_bat_file{
+  param( [string]$filePath, $old_version, $new_version)
+  $old_major, $old_minor, $old_patch = $old_version['major'], $old_version["minor"], $old_version["patch"];
+  $new_major, $new_minor, $new_patch = $new_version['major'], $new_version["minor"], $new_version["patch"];
+  $fileContent = Get-Content -Path $filePath;
+  $fileContent = $fileContent -replace "VERSION_MAJOR=$old_major", "VERSION_MAJOR=$new_major";
+  $fileContent = $fileContent -replace "VERSION_MINOR=$old_minor", "VERSION_MINOR=$new_minor";
+  $fileContent = $fileContent -replace "VERSION_PATCH=$old_patch", "VERSION_PATCH=$new_patch";
+  Set-Content -Path $filePath -Value $fileContent -Encoding UTF8;
+}
+
+# update change log, work like clog-cli
+function update_changelog {
+  param( [string]$new_tag, [string]$old_tag)
+  # get the current the previous release tag and current release tag
+  $tags = git tag --sort=creatordate | Select-String -Pattern '^\d+\.\d+\.\d+$' | ForEach-Object { $_.ToString() };
+  $latestTag = $tags[-1];
+  $commits = git log "$latestTag..HEAD" --pretty=format:"%s ([%an](https://github.com/rime/weasel/commit/%H))";
+  # group commit logs
+  $groupedCommits = @{
+    build = @(); ci = @(); fix = @(); feat = @(); docs = @(); style = @();
+    refactor = @(); test = @(); chore = @(); commit = @();
+  };
+  $groupedTitle = @{
+    build = "Builds";
+    ci = "Continuous Integration";
+    fix = "Bug Fixes";
+    feat = "Features";
+    docs = "Documents";
+    style = "Code Style";
+    refactor = "Code Refactor";
+    test = "Tests";
+    chore = "Chores";
+    commit = "Commits";
+  };
+  foreach ($commit in $commits) {
+    if ($commit -match "^(build|ci|fix|feat|docs|style|refactor|test|chore):") {
+      $prefix = $matches[1];
+      $groupedCommits[$prefix] += $commit;
+    } else {
+      $groupedCommits["commit"] += $commit;
+    }
+  }
+  $changelog = "";
+  foreach ($group in $groupedCommits.Keys) {
+    if ($groupedCommits[$group].Count -gt 0) {
+      $changelog += "`n#### " + $groupedTitle[$group] + "`n"
+        foreach ($commit in $groupedCommits[$group]) {
+          $msg = $commit -replace "^" + $group + ":", '';
+          $changelog += "* $msg`n";
+        }
+    }
+  }
+  $currentDateTime = Get-Date -Format "yyyy-MM-dd";
+  $fileContent = Get-Content -Path "CHANGELOG.md" -Raw -Encoding UTF8;
+  $contentAdd = "<a name=`"$new_tag`"></a>`n" ;
+  $contentAdd += "## [$new_tag](https://github.com/rime/weasel/compare/$old_tag...$new_tag)($currentDateTime)`n" ;
+  $contentAdd += $changelog;
+  Write-Host "`n" + $contentAdd + "`n"
+  $fileContent = $contentAdd + "`n" + $fileContent;
+  $fileContent | Out-File -FilePath "CHANGELOG.md" -Encoding UTF8;
+}
+
+# update appcast file, with regex patterns
+function update_appcast_file {
+  param( [string]$filePath, [string]$pat_orig, [string]$pat_replace)
+  $fileContent = Get-Content -Path $filePath;
+  $fileContent = $fileContent -replace $pat_orig, $pat_replace;
+  Set-Content -Path $filePath -Value $fileContent;
+}
+###############################################################################
+# program now started
+# tag name not match rule, exit
+if (-not ($tag -match '^\d+\.\d+\.\d+$')) {
+  Write-Host "tag name not match rule '^\d+\.\d+\.\d+$'";
+  Write-Host "please recheck it";
+  exit;
+}
+# get old version
+$old_version = get_old_version -filePath "build.bat";
+$old_major, $old_minor, $old_patch = $old_version['major'], $old_version["minor"], $old_version["patch"];
+# get new version
+$new_version = parse_new_version -new_version $tag
+# check new version is greater than the current one
+if ($tag -eq $old_version["str"]) {
+  Write-Host "the new tag: $tag is the same with the old one:" $old_version["str"];
+  exit;
+} elseif ($tag -lt $old_version["str"]) {
+  Write-Host "$tag is older version than " $old_version['str']", please recheck your target version.";
+  exit;
+}
+Write-Host "bump version to $tag ... "
+#get date-time string in english date-time format
+$CurrentCulture = [System.Globalization.CultureInfo]::InvariantCulture
+$currentDateTime = (Get-Date).ToString("ddd, dd MMM yyyy HH:mm:ss K", $CurrentCulture)
+
+#update appcast files
+update_appcast_file -filePath "update/appcast.xml" -pat_orig "$old_major\.$old_minor\.$old_patch" -pat_replace $tag
+update_appcast_file -filePath "update/appcast.xml" -pat_orig "<pubDate>.*?</pubDate>" -pat_replace "<pubDate>$currentDateTime</pubDate>"
+Write-Host "update/appcast.xml updated"
+update_appcast_file -filePath "update/testing-appcast.xml" -pat_orig "$old_major\.$old_minor\.$old_patch" -pat_replace $tag
+update_appcast_file -filePath "update/testing-appcast.xml" -pat_orig "<pubDate>.*?</pubDate>" -pat_replace "<pubDate>$currentDateTime</pubDate>"
+Write-Host "update/testing-appcast.xml updated"
+#update bat files
+update_bat_file -filePath "build.bat" -old_version $old_version -new_version $new_version
+Write-Host "build.bat updated"
+update_bat_file -filePath "xbuild.bat" -old_version $old_version -new_version $new_version
+Write-Host "xbuild.bat updated"
+#update CHANGELOG.md
+if ($updatelog) {
+  update_changelog -new_tag $tag -old_tag "$old_major.$old_minor.$old_patch"
+  & git add CHANGELOG.md
+  Write-Host "CHANGELOG.md updated"
+}
+#commit changes and make a new tag
+$release_message = "chore(release): $tag :tada:"
+$release_tag = $tag
+& git add update/*.xml build.bat xbuild.bat
+& git commit --message $release_message
+& git tag --annotate $release_tag --message $release_message