diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff4228b07..b11bb9034 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Improvements
 
 - Only list computable plot columns if there are other numeric columns ([#1634](../../pull/1634))
+- List official yaml mime type for the multi source ([#1636](../../pull/1636))
 
 ## 1.29.9
 
diff --git a/sources/multi/large_image_source_multi/__init__.py b/sources/multi/large_image_source_multi/__init__.py
index 199b9bb33..bc2d6ea77 100644
--- a/sources/multi/large_image_source_multi/__init__.py
+++ b/sources/multi/large_image_source_multi/__init__.py
@@ -411,6 +411,7 @@ class MultiFileTileSource(FileTileSource, metaclass=LruCacheMetaclass):
         None: SourcePriority.FALLBACK,
         'application/json': SourcePriority.PREFERRED,
         'application/yaml': SourcePriority.PREFERRED,
+        'text/yaml': SourcePriority.PREFERRED,
     }
 
     _minTileSize = 64