diff --git a/app/Http/Controllers/Backend/WikiDbVersionController.php b/app/Http/Controllers/Backend/WikiDbVersionController.php
new file mode 100644
index 00000000..3ecf214b
--- /dev/null
+++ b/app/Http/Controllers/Backend/WikiDbVersionController.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Http\Controllers\Backend;
+
+use App\Http\Controllers\Controller;
+use App\Wiki;
+use Illuminate\Http\Request;
+
+class WikiDbVersionController extends Controller {
+    // keep in sync with App\Services\MediaWikiHostResolver
+    private const DB_VERSION_TO_MW_VERSION = [
+        'mw1.39-wbs1' => '139',
+        'mw1.43-wbs1' => '143',
+    ];
+
+    public function updateWikiDbVersion(Request $request): \Illuminate\Http\JsonResponse {
+        $validated = $request->validate([
+            'domain' => 'required|string',
+            'dbVersion' => 'required|string',
+        ]);
+
+        $domain = $validated['domain'];
+        $targetDbVersion = $validated['dbVersion'];
+
+        try {
+            $wiki = Wiki::with('wikiDb')->firstWhere('domain', $domain);
+
+            if (!$wiki) {
+                return response()->json(['error' => "No wiki found with domain: '{$domain}'"], 404);
+            }
+
+            if (!array_key_exists($targetDbVersion, self::DB_VERSION_TO_MW_VERSION)) {
+                return response()->json(['error' => "Invalid database version string: '{$targetDbVersion}'"], 400);
+            }
+
+            $wiki->wikiDb->version = $targetDbVersion;
+            $wiki->wikiDb->save();
+        } catch (\Exception $e) {
+            return response()->json($e->getMessage(), 500);
+        }
+
+        return response()->json(['result' => 'success'], 200);
+    }
+}
diff --git a/app/Services/MediaWikiHostResolver.php b/app/Services/MediaWikiHostResolver.php
index a07e6f9a..342ec737 100644
--- a/app/Services/MediaWikiHostResolver.php
+++ b/app/Services/MediaWikiHostResolver.php
@@ -17,6 +17,7 @@ class UnknownWikiDomainException extends Exception {}
 
 class MediaWikiHostResolver {
     // TODO: Move this mapping to a config file so that MW updates do not require code changes here.
+    // keep in sync with App\Http\Controllers\Backend\WikiDbVersionController
     /** @var array<string, string> Map of DB version strings to MediaWiki version strings */
     private const DB_VERSION_TO_MW_VERSION = [
         'mw1.39-wbs1' => '139',
diff --git a/routes/backend.php b/routes/backend.php
index 478a4036..0be47914 100644
--- a/routes/backend.php
+++ b/routes/backend.php
@@ -11,6 +11,9 @@
 $router->get('healthz', fn () => "It's Alive");
 $router->get('getWikiHostsForDomain', ['uses' => 'MediaWikiHostsController@getWikiHostsForDomain']);
 
+// PUT
+$router->put('setWikiDbVersion', ['uses' => 'WikiDbVersionController@updateWikiDbVersion']);
+
 $router->group(['prefix' => 'ingress'], function () use ($router) {
     // GET
     $router->get('getWikiVersionForDomain', ['uses' => 'IngressController@getWikiVersionForDomain']);
diff --git a/tests/Routes/Backend/WikiDbVersionControllerTest.php b/tests/Routes/Backend/WikiDbVersionControllerTest.php
new file mode 100644
index 00000000..6be65e96
--- /dev/null
+++ b/tests/Routes/Backend/WikiDbVersionControllerTest.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace Tests\Routes\Backend;
+
+use App\Wiki;
+use App\WikiDb;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class WikiDbVersionControllerTest extends TestCase {
+    use RefreshDatabase;
+
+    const VALID_WIKI_DB_VERSION_STRING_139 = 'mw1.39-wbs1';
+
+    const VALID_WIKI_DB_VERSION_STRING_143 = 'mw1.43-wbs1';
+
+    protected $route = '/backend/setWikiDbVersion';
+
+    private function createWiki(string $domain, string $version) {
+        $wiki = Wiki::factory()->create(['domain' => $domain]);
+        WikiDb::create([
+            'name' => $domain,
+            'user' => 'someUser',
+            'password' => 'somePassword',
+            'version' => $version,
+            'prefix' => 'somePrefix',
+            'wiki_id' => $wiki->id,
+        ]);
+
+        return $wiki;
+    }
+
+    public function testSetWikiDbVersionSuccess() {
+        $targetDbVersion = self::VALID_WIKI_DB_VERSION_STRING_143;
+        $wikiDomain = 'coffeebase.wikibase.cloud';
+
+        $wiki = $this->createWiki($wikiDomain, self::VALID_WIKI_DB_VERSION_STRING_139);
+
+        $this->putJson("{$this->route}?domain={$wikiDomain}&dbVersion={$targetDbVersion}")
+            ->assertStatus(200)
+            ->assertJson([
+                'result' => 'success',
+            ]);
+
+        $newDbVersion = Wiki::with('wikiDb')->firstWhere('id', $wiki->id)->wikiDb->version;
+
+        $this->assertSame($targetDbVersion, $newDbVersion);
+    }
+
+    public function testSetWikiDbVersionWikiNotfound() {
+        $targetDbVersion = self::VALID_WIKI_DB_VERSION_STRING_143;
+        $wikiDomain = 'notFound.wikibase.cloud';
+
+        $this->putJson("{$this->route}?domain={$wikiDomain}&dbVersion={$targetDbVersion}")
+            ->assertStatus(404);
+    }
+
+    public function testSetWikiDbVersionUnknownDbVersion() {
+        $targetDbVersion = 'unknownVersion';
+        $wikiDomain = 'coffeebase.wikibase.cloud';
+
+        $this->createWiki($wikiDomain, self::VALID_WIKI_DB_VERSION_STRING_139);
+
+        $this->putJson("{$this->route}?domain={$wikiDomain}&dbVersion={$targetDbVersion}")
+            ->assertStatus(400);
+    }
+
+    public function testSetWikiDbVersionMissingDbVersion() {
+        $wikiDomain = 'coffeebase.wikibase.cloud';
+
+        $this->createWiki($wikiDomain, self::VALID_WIKI_DB_VERSION_STRING_139);
+
+        $this->putJson("{$this->route}?domain={$wikiDomain}")
+            ->assertStatus(422);
+    }
+
+    public function testSetWikiDbVersionMissingWikiDomain() {
+        $targetDbVersion = self::VALID_WIKI_DB_VERSION_STRING_143;
+        $wikiDomain = 'coffeebase.wikibase.cloud';
+
+        $this->createWiki($wikiDomain, self::VALID_WIKI_DB_VERSION_STRING_139);
+
+        $this->putJson("{$this->route}?dbVersion={$targetDbVersion}")
+            ->assertStatus(422);
+    }
+}