diff --git a/tutorials/W0D1_PythonWorkshop1/solutions/W0D1_Tutorial1_Solution_3c8e55c9.py b/tutorials/W0D1_PythonWorkshop1/solutions/W0D1_Tutorial1_Solution_3c8e55c9.py
index 883a395..0297ca6 100644
--- a/tutorials/W0D1_PythonWorkshop1/solutions/W0D1_Tutorial1_Solution_3c8e55c9.py
+++ b/tutorials/W0D1_PythonWorkshop1/solutions/W0D1_Tutorial1_Solution_3c8e55c9.py
@@ -19,7 +19,7 @@
 v_mean = np.mean(v_n, axis=0)
 
 # Compute sample standard deviation (use np.std)
-v_std = np.std(v_n, axis=0)
+v_std = np.std(v_n, axis=0, ddof=1)
 
 # Plot figure
 with plt.xkcd():
@@ -36,4 +36,4 @@
   plt.plot(t_range, v_mean-v_std, 'C7', alpha=0.8, label='mean $\pm$ std')
 
   plt.legend()
-  plt.show()
\ No newline at end of file
+  plt.show()