diff --git a/_sources/usage/index.rst.txt b/_sources/usage/index.rst.txt
index cfbc60c..374f8dc 100644
--- a/_sources/usage/index.rst.txt
+++ b/_sources/usage/index.rst.txt
@@ -679,11 +679,12 @@ with a semi-colon (;).
 
 .. code-block:: shell
 
-   phykit bipartition_support_stats <tree> [-v/--verbose]
+   phykit bipartition_support_stats <tree> [-v/--verbose --cpu <cpu>]
 
 Options: |br|
 *<alignment>*: first argument after function name should be a tree file |br|
-*-v/\\-\\-verbose*: optional argument to print all bipartition support values
+*-v/\\-\\-verbose*: optional argument to print all bipartition support values |br|
+*\\-\\-cpu*: CPUs to use to accelerate calculation
 
 |
 
diff --git a/usage/index.html b/usage/index.html
index 07b4173..37e12a5 100644
--- a/usage/index.html
+++ b/usage/index.html
@@ -698,12 +698,13 @@ <h3>Bipartition support statistics<a class="headerlink" href="#bipartition-suppo
 In addition to support values for each node, the names of all terminal
 branches tips are also included. Each terminal branch name is separated
 with a semi-colon (;).</p>
-<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>phykit<span class="w"> </span>bipartition_support_stats<span class="w"> </span>&lt;tree&gt;<span class="w"> </span><span class="o">[</span>-v/--verbose<span class="o">]</span>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>phykit<span class="w"> </span>bipartition_support_stats<span class="w"> </span>&lt;tree&gt;<span class="w"> </span><span class="o">[</span>-v/--verbose<span class="w"> </span>--cpu<span class="w"> </span>&lt;cpu&gt;<span class="o">]</span>
 </pre></div>
 </div>
 <p>Options: <br/>
 <em>&lt;alignment&gt;</em>: first argument after function name should be a tree file <br/>
-<em>-v/\-\-verbose</em>: optional argument to print all bipartition support values</p>
+<em>-v/\-\-verbose</em>: optional argument to print all bipartition support values <br/>
+<em>\-\-cpu</em>: CPUs to use to accelerate calculation</p>
 <div class="line-block">
 <div class="line"><br /></div>
 </div>