diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/extension/model/AccountDetailsExtensions.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/extension/model/AccountDetailsExtensions.kt
index 92998a6aa..4007130fb 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/extension/model/AccountDetailsExtensions.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/extension/model/AccountDetailsExtensions.kt
@@ -71,6 +71,16 @@ fun AccountDetails.getMediaSizeLimit(@MediaCategory mediaCategory: String? = nul
             }
             return UpdateStatusTask.SizeLimit(imageLimit, videoLimit)
         }
+        AccountType.MASTODON -> {
+            val imageLimit = AccountExtras.ImageLimit().apply {
+                maxSizeSync = 8 * 1024 * 1024
+                maxSizeAsync = 8 * 1024 * 1024
+                maxHeight = 1280
+                maxWidth = 1280
+            }
+            val videoLimit = AccountExtras.VideoLimit.twitterDefault()
+            return UpdateStatusTask.SizeLimit(imageLimit, videoLimit)
+        }
         else -> return null
     }
 }