diff --git a/CHANGELOG.md b/CHANGELOG.md
index e19d0d561..ff5c954b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,8 @@
 - Add metadata and annotation metadata search modes to Girder ([#974](../../pull/974))
 - Add the ability to show annotation metadata in item annotation lists ([#977](../../pull/977))
 - Support ETAG in annotation rest responses for better browser caching ([#978](../../pull/978))
-- Thumbnail maintenance endpoints ([#979](../../pull/979))
+- Thumbnail maintenance endpoints ([#980](../../pull/980))
+- Handle lif file extensions ([#981](../../pull/981))
 
 ## 1.17.0
 
diff --git a/sources/bioformats/large_image_source_bioformats/__init__.py b/sources/bioformats/large_image_source_bioformats/__init__.py
index 037389ae5..e673609a1 100644
--- a/sources/bioformats/large_image_source_bioformats/__init__.py
+++ b/sources/bioformats/large_image_source_bioformats/__init__.py
@@ -153,6 +153,7 @@ class BioformatsFileTileSource(FileTileSource, metaclass=LruCacheMetaclass):
     extensions = {
         None: SourcePriority.FALLBACK,
         'czi': SourcePriority.PREFERRED,
+        'lif': SourcePriority.MEDIUM,
         'vsi': SourcePriority.PREFERRED,
     }
     mimeTypes = {