diff --git a/docs/src/guide/getting_started.jl b/docs/src/guide/getting_started.jl
index 887041f..e36b0b8 100644
--- a/docs/src/guide/getting_started.jl
+++ b/docs/src/guide/getting_started.jl
@@ -54,7 +54,7 @@ using LinearAlgebra
 using ProximalOperators
 using ProximalAlgorithms
 
-quadratic_cost(x) = dot([3.4 1.2; 1.2 89.1] * x, x) / 2 + dot([-2.3, 99.9], x)
+quadratic_cost(x) = dot([3.4 1.2; 1.2 4.5] * x, x) / 2 + dot([-2.3, 9.9], x)
 box_indicator = ProximalOperators.IndBox(0, 1)
 
 ffb = ProximalAlgorithms.FastForwardBackward(maxit=1000, tol=1e-5, verbose=true)