diff --git a/app/javascript/mastodon/actions/compose.js b/app/javascript/mastodon/actions/compose.js
index b07dff182..0bcba7d57 100644
--- a/app/javascript/mastodon/actions/compose.js
+++ b/app/javascript/mastodon/actions/compose.js
@@ -279,7 +279,7 @@ export function submitComposeFail(error) {
 
 export function uploadCompose(files) {
   return function (dispatch, getState) {
-    const uploadLimit = 4;
+    const uploadLimit = getState().getIn(['server', 'server', 'configuration', 'statuses', 'max_media_attachments']);
     const media = getState().getIn(['compose', 'media_attachments']);
     const pending = getState().getIn(['compose', 'pending_media_attachments']);
     const progress = new Array(files.length).fill(0);
@@ -299,7 +299,7 @@ export function uploadCompose(files) {
     dispatch(uploadComposeRequest());
 
     for (const [i, file] of Array.from(files).entries()) {
-      if (media.size + i > 3) break;
+      if (media.size + i > (uploadLimit - 1)) break;
 
       const data = new FormData();
       data.append('file', file);
diff --git a/app/javascript/mastodon/components/media_gallery.jsx b/app/javascript/mastodon/components/media_gallery.jsx
index 91459a128..ed4805b05 100644
--- a/app/javascript/mastodon/components/media_gallery.jsx
+++ b/app/javascript/mastodon/components/media_gallery.jsx
@@ -305,13 +305,13 @@ class MediaGallery extends PureComponent {
       style.aspectRatio = '3 / 2';
     }
 
-    const size     = media.take(4).size;
+    const size     = media.size;
     const uncached = media.every(attachment => attachment.get('type') === 'unknown');
 
     if (this.isFullSizeEligible()) {
       children = <Item standalone autoplay={autoplay} onClick={this.handleClick} attachment={media.get(0)} lang={lang} displayWidth={width} visible={visible} />;
     } else {
-      children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} autoplay={autoplay} onClick={this.handleClick} attachment={attachment} index={i} lang={lang} size={size} displayWidth={width} visible={visible || uncached} />);
+      children = media.map((attachment, i) => <Item key={attachment.get('id')} autoplay={autoplay} onClick={this.handleClick} attachment={attachment} index={i} lang={lang} size={size} displayWidth={width} visible={visible || uncached} />);
     }
 
     if (uncached) {
diff --git a/app/javascript/mastodon/features/compose/containers/upload_button_container.js b/app/javascript/mastodon/features/compose/containers/upload_button_container.js
index 066e18534..7cdc12663 100644
--- a/app/javascript/mastodon/features/compose/containers/upload_button_container.js
+++ b/app/javascript/mastodon/features/compose/containers/upload_button_container.js
@@ -9,7 +9,7 @@ const mapStateToProps = state => {
   const readyAttachmentsSize = state.getIn(['compose', 'media_attachments']).size ?? 0;
   const pendingAttachmentsSize = state.getIn(['compose', 'pending_media_attachments']).size ?? 0;
   const attachmentsSize = readyAttachmentsSize + pendingAttachmentsSize;
-  const isOverLimit = attachmentsSize > 3;
+  const isOverLimit = attachmentsSize > state.getIn(['server', 'server', 'configuration', 'statuses', 'max_media_attachments'])-1;
   const hasVideoOrAudio = state.getIn(['compose', 'media_attachments']).some(m => ['video', 'audio'].includes(m.get('type')));
 
   return {