diff --git a/Turbulence_Sim_v1_python/Example_1_full.py b/Turbulence_Sim_v1_python/Example_1_full.py
index c5d53e0..478da76 100644
--- a/Turbulence_Sim_v1_python/Example_1_full.py
+++ b/Turbulence_Sim_v1_python/Example_1_full.py
@@ -20,7 +20,7 @@ def rgb2gray(rgb):
     return np.dot(rgb[...,:3], [0.2989, 0.5870, 0.1140])
 
 
-img = rgb2gray(plt.imread('chart.png'))
+img = rgb2gray(plt.imread('./data/chart.png'))
 N = 225 # size of the image -- assumed to be square (pixels)
 D = 0.2 # length of aperture diameter (meters)
 L = 7000 # length of propagation (meters)