diff --git a/heatmap.pdf b/heatmap.pdf
index 435df19..27cba47 100644
Binary files a/heatmap.pdf and b/heatmap.pdf differ
diff --git a/plotter.py b/plotter.py
index a4b56f7..266d14e 100644
--- a/plotter.py
+++ b/plotter.py
@@ -63,8 +63,11 @@ hm.invert_yaxis()
 # fix xtics
 locs, labels = plt.xticks()
 plt.xticks(locs, [f"$2^{{{int(math.log2(int(i.get_text())))}}}$" for i in labels])
+plt.xlabel("n")
+
 locs, labels = plt.yticks()
 plt.yticks(locs, [f"$2^{{{int(math.log2(int(i.get_text())))}}}$" for i in labels])
+plt.ylabel("step")
 
 plt.show()