diff --git a/lectures/monte_carlo.md b/lectures/monte_carlo.md
index 9f66c229..2797dd97 100644
--- a/lectures/monte_carlo.md
+++ b/lectures/monte_carlo.md
@@ -650,7 +650,7 @@ Now let's try with larger $M$ to get a more accurate calculation.
 
 ```{code-cell} ipython3
 %%time
-compute_call_price(M=10_000_000)
+compute_call_price(M=500_000)
 ```