diff --git a/ZM_05.tex b/ZM_05.tex
index db0e468..ee7b0ca 100644
--- a/ZM_05.tex
+++ b/ZM_05.tex
@@ -120,7 +120,7 @@ A=6, R_1=1k\Omega, R_2=5k\Omega
     xmin=-4, xmax=4,
     ymin=-20, ymax=20,
     xtick={-3,-2,-1,-0,1,2,3},
-    ytick={-15,-13,-10,-5,0,5,10,13,15},
+    ytick={-15,-13,-10,-7,-4,-2,0,2,4,7,10,13,15},
     legend pos=north west,
     ymajorgrids=true,
     grid style=dashed,