diff --git a/omeroweb/webgateway/marshal.py b/omeroweb/webgateway/marshal.py
index 5052580ab1..64fd9e7a7d 100644
--- a/omeroweb/webgateway/marshal.py
+++ b/omeroweb/webgateway/marshal.py
@@ -64,8 +64,10 @@ def getChannelsNoRe(image):
                 left outer join fetch c.statsInfo
                 where p.id=:id"""
     pixels = conn.getQueryService().findByQuery(query, params, conn.SERVICE_OPTS)
-    return [ChannelWrapper(conn, c, idx=n, img=image)
-            for n, c in enumerate(pixels.iterateChannels())]
+    return [
+        ChannelWrapper(conn, c, idx=n, img=image)
+        for n, c in enumerate(pixels.iterateChannels())
+    ]
 
 
 def eventContextMarshal(event_context):
@@ -113,7 +115,8 @@ def getPixelRange(image):
         PixelsTypeint32: -2147483648,
         PixelsTypeuint32: 0,
         PixelsTypefloat: -2147483648,
-        PixelsTypedouble: -2147483648}
+        PixelsTypedouble: -2147483648,
+    }
     maxVals = {
         PixelsTypeint8: 127,
         PixelsTypeuint8: 255,
@@ -122,7 +125,8 @@ def getPixelRange(image):
         PixelsTypeint32: 2147483647,
         PixelsTypeuint32: 4294967295,
         PixelsTypefloat: 2147483647,
-        PixelsTypedouble: 2147483647}
+        PixelsTypedouble: 2147483647,
+    }
     pixtype = image.getPrimaryPixels().getPixelsType().getValue()
     return [minVals[pixtype], maxVals[pixtype]]
 
@@ -145,7 +149,7 @@ def rdefMarshal(rdef, image, pixel_range):
 
     channels = []
 
-    for rdef_ch, channel in zip(rdef['c'], getChannelsNoRe(image)):
+    for rdef_ch, channel in zip(rdef["c"], getChannelsNoRe(image)):
 
         chan = {
             "emissionWave": channel.getEmissionWave(),
@@ -368,7 +372,9 @@ def pixel_size_in_microns(method):
         if tiles:
             width, height = image._re.getTileSize()
             zoomLevelScaling = image.getZoomLevelScaling()
-            rv.update({"tile_size": {"width": width, "height": height}, "levels": levels})
+            rv.update(
+                {"tile_size": {"width": width, "height": height}, "levels": levels}
+            )
             if zoomLevelScaling is not None:
                 rv["zoomLevelScaling"] = zoomLevelScaling