diff --git a/libcodonusage/__init__.py b/libcodonusage/__init__.py
index 4241c507bd3127ebcfcaed45519d8030c91371e3..8d68210b1570b3050c1a22f2523baf274e77a9a8 100644
--- a/libcodonusage/__init__.py
+++ b/libcodonusage/__init__.py
@@ -1,6 +1,6 @@
 __copyright__ = "Copyright (C) 2022 Blaise Li"
 __licence__ = "GNU GPLv3"
-__version__ = "0.23"
+__version__ = "0.24"
 from .libcodonusage import (
     aa2colour,
     aa_usage,
diff --git a/libcodonusage/libcodonusage.py b/libcodonusage/libcodonusage.py
index c675e92d77b3953861902607b2bf89ba658dd632..70da58fc2aa5234ad6c33f2b20504c4bea105b64 100644
--- a/libcodonusage/libcodonusage.py
+++ b/libcodonusage/libcodonusage.py
@@ -1333,16 +1333,13 @@ def violin_usage(
         "data": long_form, "ax": axis, "orient": "v", "scale": "count"}
     kwargs.update(violin_kwargs)
     axis = sns.violinplot(**kwargs)
-    # sns.violinplot(x=variable, y=ylabel, order=variable2order(variable),
-    #                hue=hue, palette=palette, dodge=dodge,
-    #                data=long_form, ax=axis, orient="v", scale="count",
-    #                **violin_kwargs)
     if do_legend:
         plt.legend(bbox_to_anchor=(1.01, 1), borderaxespad=0)
     if variable == "codon":
         ticklabels = format_codon_labels(axis.get_xticklabels())
     else:
         ticklabels = axis.get_xticklabels()
+    # TODO: Expect issues when variable == "aa"
     axis.set_xticklabels(ticklabels, rotation=90)
     return axis
 
@@ -1365,7 +1362,13 @@ def violin_usage_vertical(
         nb_violins = len(usage_table.index.get_level_values(hue).unique())
     long_form = to_long_form(usage_table, ylabel, others=[hue])
     if axis is None:
-        _, axis = plt.subplots(figsize=(6, 44 * nb_violins))
+        if variable == "codon":
+            base_height = 44
+        elif variable == "aa":
+            base_height = 18
+        else:
+            raise NotImplementedError(f"Unsupported variable: {variable}.")
+        _, axis = plt.subplots(figsize=(6, base_height * nb_violins))
     if hue == "aa":
         palette = aa2colour
     else:
@@ -1377,16 +1380,9 @@ def violin_usage_vertical(
         "data": long_form, "ax": axis, "orient": "h", "scale": "count"}
     kwargs.update(violin_kwargs)
     axis = sns.violinplot(**kwargs)
-    # sns.violinplot(
-    #     y=variable, x=ylabel, order=variable2order(variable),
-    #     hue=hue, palette=palette, dodge=dodge,
-    #     data=long_form, ax=axis, orient="h", scale="count",
-    #     **violin_kwargs)
     if variable == "codon":
         ticklabels = format_codon_labels(axis.get_yticklabels())
-    else:
-        ticklabels = axis.get_xticklabels()
-    axis.set_yticklabels(ticklabels)
+        axis.set_yticklabels(ticklabels)
     return axis