diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89f11aa1b..fb133f1e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,9 +8,11 @@
 
 ### Changes
 - Work with newer python-mapnik ([#1550](../../pull/1550))
+- Use the new official yaml mime-type of application/yaml ([#1558](../../pull/1558))
 
 ### Bug Fixes
 - Fix an issue emitting rectangles in geojson ([#1552](../../pull/1552))
+- Fix an issue writing zarr channel meatdata ([#1557](../../pull/1557))
 
 ## 1.29.0
 
diff --git a/girder/girder_large_image/__init__.py b/girder/girder_large_image/__init__.py
index 77f25fdb5..060de66cf 100644
--- a/girder/girder_large_image/__init__.py
+++ b/girder/girder_large_image/__init__.py
@@ -251,6 +251,8 @@ def handleFileSave(event):
             for mimeType, ext, std in [
                 ('text/yaml', '.yaml', True),
                 ('text/yaml', '.yml', True),
+                ('application/yaml', '.yaml', True),
+                ('application/yaml', '.yml', True),
                 ('application/vnd.geo+json', '.geojson', True),
             ]:
                 if ext not in mimetypes.types_map:
@@ -499,14 +501,14 @@ def yamlConfigFileWrite(folder, name, user, yaml_config):
     item = Item().createItem(name, user, folder, reuseExisting=True)
     existingFiles = list(Item().childFiles(item))
     if (len(existingFiles) == 1 and
-            existingFiles[0]['mimeType'] == 'text/yaml' and
+            existingFiles[0]['mimeType'] == 'application/yaml' and
             existingFiles[0]['name'] == name):
         upload = Upload().createUploadToFile(
             existingFiles[0], user, size=len(yaml_config))
     else:
         upload = Upload().createUpload(
             user, name, 'item', item, size=len(yaml_config),
-            mimeType='text/yaml', save=True)
+            mimeType='application/yaml', save=True)
     newfile = Upload().handleChunk(upload, yaml_config)
     with _configWriteLock:
         for entry in list(Item().childFiles(item)):
diff --git a/girder/girder_large_image/web_client/views/itemViewCodemirror.js b/girder/girder_large_image/web_client/views/itemViewCodemirror.js
index 7786a1727..021db1a4c 100644
--- a/girder/girder_large_image/web_client/views/itemViewCodemirror.js
+++ b/girder/girder_large_image/web_client/views/itemViewCodemirror.js
@@ -156,6 +156,7 @@ const Formats = {
 Formats['application/vnd.geo+json'] = Formats['application/json'];
 Formats['text/x-yaml'] = Formats['text/yaml'];
 Formats['application/x-yaml'] = Formats['text/yaml'];
+Formats['application/yaml'] = Formats['text/yaml'];
 
 function lintGirderIni(text, callback) {
     return restRequest({
diff --git a/tox.ini b/tox.ini
index dca08a32c..60a331ada 100644
--- a/tox.ini
+++ b/tox.ini
@@ -395,7 +395,6 @@ include =
   utilities/converter/*
   utilities/tasks*
 parallel = True
-core = sysmon
 
 [coverage:html]
 directory = build/test/artifacts/python_coverage