diff --git a/app/soapbox/utils/__tests__/features-test.js b/app/soapbox/utils/__tests__/features-test.js
index 77f8d882a..900928fa0 100644
--- a/app/soapbox/utils/__tests__/features-test.js
+++ b/app/soapbox/utils/__tests__/features-test.js
@@ -92,4 +92,20 @@ describe('getFeatures', () => {
       expect(features.trends).toBe(false);
     });
   });
+
+  describe('attachmentLimit', () => {
+    it('is 4 by default', () => {
+      const instance = ImmutableMap({ version: '3.1.4' });
+      const features = getFeatures(instance);
+      expect(features.attachmentLimit).toEqual(4);
+    });
+
+    it('is Infinity for Pleroma', () => {
+      const instance = ImmutableMap({
+        version: '2.7.2 (compatible; Pleroma 1.1.50-42-g3d9ac6ae-develop)',
+      });
+      const features = getFeatures(instance);
+      expect(features.attachmentLimit).toEqual(Infinity);
+    });
+  });
 });
diff --git a/app/soapbox/utils/features.js b/app/soapbox/utils/features.js
index 6ef0ba834..2c29b34dc 100644
--- a/app/soapbox/utils/features.js
+++ b/app/soapbox/utils/features.js
@@ -7,6 +7,7 @@ export const getFeatures = instance => {
     suggestions: v.software === 'Mastodon' && semver.gte(v.compatVersion, '2.4.3'),
     trends: v.software === 'Mastodon' && semver.gte(v.compatVersion, '3.0.0'),
     emojiReacts: v.software === 'Pleroma' && semver.gte(v.version, '2.0.0'),
+    attachmentLimit: v.software === 'Pleroma' ? Infinity : 4,
   };
 };