diff --git a/src/8_many_atoms.md b/src/8_many_atoms.md
index 1d88310e5cd00b6ce0591aa04c1071eac2ef4c76..dbe80636daf95272ad4539f670e69384564933e6 100644
--- a/src/8_many_atoms.md
+++ b/src/8_many_atoms.md
@@ -100,7 +100,7 @@ pyplot.yticks([], [])
 pyplot.vlines([-pi, pi], 0, 2.2, linestyles='dashed')
 pyplot.legend()
 pyplot.xlim(-1.75*pi, 3.5*pi)
-pyplot.ylim(bottom=-0.6)
+pyplot.ylim(bottom=0)
 ax.annotate(s='', xy=(-pi, -.3), xytext=(pi, -.3),
             arrowprops=dict(arrowstyle='<->', shrinkA=0, shrinkB=0))
 ax.text(0, -.55, '1st Brillouin zone', ha='center')