diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4bb490e4..a8508274 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -86,6 +86,7 @@ max_emoji_description_size = 1000
 - Fixed several issues with the [ActivityPub Federation Bridge](https://github.com/versia-pub/activitypub) preventing it from operating properly.
 - Fixed incorrect content-type on some media when using S3.
 - All media content-type is now correctly fetched, instead of guessed from the file extension.
+- Added missing attributes to `/api/v1/instance` (some clients were expecting them).
 
 # `0.7.0` • The Auth and APIs Update
 
diff --git a/api/api/v1/instance/index.ts b/api/api/v1/instance/index.ts
index b45c9822..4f0e864e 100644
--- a/api/api/v1/instance/index.ts
+++ b/api/api/v1/instance/index.ts
@@ -72,6 +72,17 @@ export default apiRoute((app) =>
                     max_media_attachments:
                         config.validation.max_media_attachments,
                 },
+                media_attachments: {
+                    supported_mime_types: config.validation.allowed_mime_types,
+                    image_size_limit: config.validation.max_media_size,
+                    image_matrix_limit: config.validation.max_media_size,
+                    video_size_limit: config.validation.max_media_size,
+                    video_frame_rate_limit: config.validation.max_media_size,
+                    video_matrix_limit: config.validation.max_media_size,
+                },
+                accounts: {
+                    max_featured_tags: 100,
+                },
             },
             description: config.instance.description,
             email: "",