diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 86c241a..fedd76b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -139,6 +139,35 @@ jobs:
           $changelog = "changelog<<CHANGELOG_EOF`n$($log -join "`n")`nCHANGELOG_EOF"
           Add-Content -Path $env:GITHUB_OUTPUT -Value $changelog
 
+      - name: Versionsnummer aus Tag automatisch setzen (nur bei Versions-Tag)
+        if: startsWith(github.ref, 'refs/tags/v')
+        working-directory: tauri-app
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = "Stop"
+          $version = "${{ github.ref_name }}" -replace '^v', ''
+          Write-Host "Setze Version auf $version in tauri.conf.json, package.json, Cargo.toml ..."
+
+          $confPath = "src-tauri/tauri.conf.json"
+          $content = Get-Content $confPath -Raw
+          $neu = $content -replace '("version"\s*:\s*)"[^"]*"', "`$1`"$version`""
+          if ($neu -eq $content) { Write-Error "Version in $confPath nicht gefunden/ersetzt." }
+          Set-Content -Path $confPath -Value $neu -NoNewline
+
+          $pkgPath = "package.json"
+          $content = Get-Content $pkgPath -Raw
+          $neu = $content -replace '("version"\s*:\s*)"[^"]*"', "`$1`"$version`""
+          if ($neu -eq $content) { Write-Error "Version in $pkgPath nicht gefunden/ersetzt." }
+          Set-Content -Path $pkgPath -Value $neu -NoNewline
+
+          $cargoPath = "src-tauri/Cargo.toml"
+          $content = Get-Content $cargoPath -Raw
+          $neu = $content -replace '(?m)^version = "[^"]*"', "version = `"$version`""
+          if ($neu -eq $content) { Write-Error "Version in $cargoPath nicht gefunden/ersetzt." }
+          Set-Content -Path $cargoPath -Value $neu -NoNewline
+
+          Write-Host "  Erledigt, alle drei Dateien jetzt auf $version."
+
       - name: Bauen und signieren (nur bei Versions-Tag)
         if: startsWith(github.ref, 'refs/tags/v')
         working-directory: tauri-app