diff --git a/aliby/utils/imageViewer.py b/aliby/utils/imageViewer.py
index 6a60ad18a8b2c5a8a8de2daaa577d10da2153a21..c76ae14dc7b5e1140f0aa2eaf8e5e17cb306343f 100644
--- a/aliby/utils/imageViewer.py
+++ b/aliby/utils/imageViewer.py
@@ -312,8 +312,8 @@ class remoteImageViewer:
         )
         plt.yticks(
             ticks=[
-                self.tiler.tile_size * (i + 0.5)
-                + (i * self.tiler.tile_size * nrows)
+                (i * self.tiler.tile_size * nrows)
+                + self.tiler.tile_size * nrows / 2
                 for i in range(len(channels))
             ],
             labels=channel_labels,
diff --git a/pyproject.toml b/pyproject.toml
index 7bcbff7c3a5cfe0f03b8c6b85352c7fd751e6215..9e26e2a3e2e36183f71507f3e8cc454856a831b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ requests-toolbelt = "^0.9.1"
 h5py = "2.10" # I/O into files
 imageio = "2.8.0"
 omero-py = ">=5.6.2" # contact omero server
-aliby-agora = "^0.2.30"
+aliby-agora = "^0.2.29"
 aliby-baby = "^0.1.10"
 aliby-post = "^0.1.27"
 p-tqdm = "^1.3.3" # Parallel progress bars