diff --git a/activities/migrations/0002_hashtag.py b/activities/migrations/0002_hashtag.py
index 468bd95..c1b4bbd 100644
--- a/activities/migrations/0002_hashtag.py
+++ b/activities/migrations/0002_hashtag.py
@@ -1,5 +1,6 @@
 # Generated by Django 4.1.3 on 2022-11-27 20:16
 
+import django.contrib.postgres.indexes
 from django.db import migrations, models
 
 import activities.models.hashtag
@@ -48,4 +49,10 @@ class Migration(migrations.Migration):
                 "abstract": False,
             },
         ),
+        migrations.AddIndex(
+            model_name="post",
+            index=django.contrib.postgres.indexes.GinIndex(
+                fields=["hashtags"], name="hashtags_gin"
+            ),
+        ),
     ]
diff --git a/activities/models/post.py b/activities/models/post.py
index b61abd4..f3b1879 100644
--- a/activities/models/post.py
+++ b/activities/models/post.py
@@ -4,6 +4,7 @@ from typing import Dict, Iterable, Optional, Set
 import httpx
 import urlman
 from asgiref.sync import sync_to_async
+from django.contrib.postgres.indexes import GinIndex
 from django.db import models, transaction
 from django.template.defaultfilters import linebreaks_filter
 from django.utils import timezone
@@ -187,6 +188,11 @@ class Post(StatorModel):
 
     objects = PostManager()
 
+    class Meta:
+        indexes = [
+            GinIndex(fields=["hashtags"], name="hashtags_gin"),
+        ]
+
     class urls(urlman.Urls):
         view = "{self.author.urls.view}posts/{self.id}/"
         object_uri = "{self.author.actor_uri}posts/{self.id}/"