diff --git a/database/migrations/2026_03_14_000000_expand_webmentions_source_target_to_text.php b/database/migrations/2026_03_14_000000_expand_webmentions_source_target_to_text.php
new file mode 100644
index 00000000..de643ab0
--- /dev/null
+++ b/database/migrations/2026_03_14_000000_expand_webmentions_source_target_to_text.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('webmentions', function (Blueprint $table) {
+            $table->text('source')->change();
+            $table->text('target')->change();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('webmentions', function (Blueprint $table) {
+            $table->string('source')->change();
+            $table->string('target')->change();
+        });
+    }
+};
diff --git a/database/schema/pgsql-schema.sql b/database/schema/pgsql-schema.sql
index 6dae72e5..d1f926a3 100644
--- a/database/schema/pgsql-schema.sql
+++ b/database/schema/pgsql-schema.sql
@@ -723,8 +723,8 @@ ALTER SEQUENCE public.users_id_seq OWNED BY public.users.id;
 
 CREATE TABLE public.webmentions (
     id integer NOT NULL,
-    source character varying(255) NOT NULL,
-    target character varying(255) NOT NULL,
+    source text NOT NULL,
+    target text NOT NULL,
     commentable_id integer,
     commentable_type character varying(255),
     type character varying(255),
diff --git a/tests/Unit/Jobs/ProcessWebMentionJobTest.php b/tests/Unit/Jobs/ProcessWebMentionJobTest.php
index e3754b86..549dee60 100644
--- a/tests/Unit/Jobs/ProcessWebMentionJobTest.php
+++ b/tests/Unit/Jobs/ProcessWebMentionJobTest.php
@@ -195,6 +195,38 @@ class ProcessWebMentionJobTest extends TestCase
         ]);
     }
 
+    #[Test]
+    public function webmention_with_long_source_url_gets_saved(): void
+    {
+        Queue::fake();
+
+        $parser = new Parser;
+
+        $html = <<<'HTML'
+        <div class="h-entry">
+            I liked <a class="u-like-of" href="/notes/1">a note</a>.
+        </div>
+        HTML;
+        $html = str_replace('href="', 'href="' . config('app.url'), $html);
+        $mock = new MockHandler([
+            new Response(200, [], $html),
+        ]);
+        $handler = HandlerStack::create($mock);
+        $client = new Client(['handler' => $handler]);
+
+        $note = Note::factory()->create();
+        // Simulate a long brid.gy Bluesky source URL (well over 255 characters)
+        $source = 'https://brid.gy/comment/bluesky/did:plc:n3jhgiq2ykctnpgzlm6p6b25/at%253A%252F%252Fdid%253Aplc%253An3jhgiq2ykctnpgzlm6p6b25%252Fapp.bsky.feed.post%252F3mfekjuhykb2k/at%253A%252F%252Fdid%253Aplc%253Afsfuwigo5juzdwp23hyianzg%252Fapp.bsky.feed.post%252F3mfemw4rrvs2t';
+
+        $job = new ProcessWebMention($note, $source);
+        $job->handle($parser, $client);
+
+        $this->assertGreaterThan(255, strlen($source));
+        $this->assertDatabaseHas('webmentions', [
+            'source' => $source,
+        ]);
+    }
+
     #[Test]
     public function webmention_repost_gets_deleted_when_repost_of_value_changes(): void
     {