diff --git a/modules/deeplearning/quantile_regression.py b/modules/deeplearning/quantile_regression.py
index 2dae1fc5ccdc18502b75e737c8e903dd962986d6..e3fc775a3d1a391ee40df2d40888561f44f9b785 100644
--- a/modules/deeplearning/quantile_regression.py
+++ b/modules/deeplearning/quantile_regression.py
@@ -22,7 +22,7 @@ def true_func(x):
     # Y = 2 + 1.5 * X + epsilon  # Linear relationship with variance increasing
     # Y = 1 + np.exp(X / 4) + epsilon
     # Y = 1 + np.exp(X / 4) + np.sin((2*np.pi/5)*X)
-    return 1 + np.exp(x / 4) + np.sin((2*np.pi/5)*x)
+    return 1 + np.exp(x / 4) + 0.5*np.sin((2*np.pi/5)*x)
 
 # Generate synthetic dataset
 def make_data(num_points=1000):