diff --git a/gseapy/plot.py b/gseapy/plot.py
index d528d53..0cc4441 100644
--- a/gseapy/plot.py
+++ b/gseapy/plot.py
@@ -1342,7 +1342,7 @@ def axes_hits(
         trans2 = transforms.blended_transform_factory(ax2.transData, ax2.transAxes)
         # align hits to runes
         ax2.vlines(
-            [0, len(self.runes) - 1],
+            [1, len(self.runes[0])],
             0,
             1,
             linewidth=0.5,