diff --git a/src/visualise/__init__.py b/src/visualise/__init__.py
index 9b6d40f..250b229 100644
--- a/src/visualise/__init__.py
+++ b/src/visualise/__init__.py
@@ -91,7 +91,7 @@ def add_data(
 def make_heatmap():
     fig = plt.figure()
     ax = fig.add_axes([0, 0, 1, 1], polar=True)
-    r = np.linspace(0, 3e-8, 100)  # Radius values
+    r = np.linspace(0, 1e-7, 100)  # Radius values
     theta = np.linspace(0, np.pi, 50)  # Angle values
     R, Theta = np.meshgrid(r, theta)  # Create a 2D grid of r and theta