diff --git a/users/migrations/0043_accesstoken.py b/users/migrations/0043_accesstoken.py
index 709235c..60b8436 100644
--- a/users/migrations/0043_accesstoken.py
+++ b/users/migrations/0043_accesstoken.py
@@ -17,7 +17,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('access_token', models.CharField(max_length=32, verbose_name='access token')),
-                ('expires_in', models.PositiveSmallIntegerField(verbose_name='expires in')),
+                ('expires_in', models.PositiveIntegerField(verbose_name='expires in')),
                 ('scopes', models.CharField(max_length=255, verbose_name='scopes')),
                 ('refresh_token', models.CharField(max_length=32, verbose_name='refresh token')),
                 ('expires_at', models.DateTimeField(verbose_name='expires at')),
diff --git a/users/models.py b/users/models.py
index 9ba6f45..36f4d60 100644
--- a/users/models.py
+++ b/users/models.py
@@ -119,7 +119,7 @@ class AccessToken(models.Model):
         verbose_name=_('access token'),
     )
 
-    expires_in = models.PositiveSmallIntegerField(
+    expires_in = models.PositiveIntegerField(
         verbose_name=_('expires in'),
     )