diff --git a/miscplot/variability.py b/miscplot/variability.py
index ae64261..af82647 100644
--- a/miscplot/variability.py
+++ b/miscplot/variability.py
@@ -118,6 +118,7 @@ def variability_plot(
         boxprops.setdefault('showfliers', False)
         boxprops.setdefault('medianprops', dict(linewidth=3, color='darkred', alpha=0.8))
         boxprops.setdefault('boxprops', dict(linewidth=0.5, color='black'))
+        boxprops.setdefault('whiskerprops', dict(linewidth=0.5, color='black'))
         _boxplt = ax.boxplot(y_lists, positions=range(num_dsets), **boxprops)
     if meanprops:
         means = [yl.mean() for yl in y_lists]