diff --git a/docs/tutorial/getting-started_1.rst b/docs/tutorial/getting-started_1.rst
index b7da566..80d1ff1 100644
--- a/docs/tutorial/getting-started_1.rst
+++ b/docs/tutorial/getting-started_1.rst
@@ -445,9 +445,9 @@ It takes a few minutes to complete the calculation. The code generates two figur
     :align: center
 
 
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 Calculate dipoles along MD trajectories (Python interface)
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+************************************************************
 
 
 After constructing four dipole moment models (``CH``, ``CO``, ``OH``, and ``O``) and validating our trained model works well, we try our model on molecular dynamics trajectories using Python interface.
@@ -589,9 +589,9 @@ As the MD trajectory is too short, we can not get meaningful spectra. We will ac
 
 
 
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+**********************************************************
 Calculate dipoles along MD trajectories (C++ interface)
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+**********************************************************
 
 
 After constructing four dipole moment models (``CH``, ``CO``, ``OH``, and ``O``) and validating our trained model works well, we try our model on molecular dynamics trajectories using C++ interface. Let us go to the example directory