diff --git a/.buildinfo b/.buildinfo
index 32df54f..ab8923a 100644
--- a/.buildinfo
+++ b/.buildinfo
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diff --git a/_static/documentation_options.js b/_static/documentation_options.js
index f34fa31..b46709d 100644
--- a/_static/documentation_options.js
+++ b/_static/documentation_options.js
@@ -1,6 +1,6 @@
 var DOCUMENTATION_OPTIONS = {
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     COLLAPSE_INDEX: false,
     BUILDER: 'html',
diff --git a/genindex.html b/genindex.html
index 88adec9..8ed75b0 100644
--- a/genindex.html
+++ b/genindex.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Index &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>Index &mdash; kaldifeat 1.25.2 documentation</title>
       <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
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@@ -32,7 +32,7 @@
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           </a>
               <div class="version">
-                1.25.1
+                1.25.2
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diff --git a/index.html b/index.html
index 33b13ec..d94e251 100644
--- a/index.html
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@@ -4,7 +4,7 @@
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>kaldifeat &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>kaldifeat &mdash; kaldifeat 1.25.2 documentation</title>
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       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
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@@ -34,7 +34,7 @@
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           </a>
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-                1.25.1
+                1.25.2
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diff --git a/installation/faq.html b/installation/faq.html
index 87a6f1b..40e4d98 100644
--- a/installation/faq.html
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>FAQs &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>FAQs &mdash; kaldifeat 1.25.2 documentation</title>
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@@ -35,7 +35,7 @@
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-                1.25.1
+                1.25.2
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diff --git a/installation/from_source.html b/installation/from_source.html
index 87e9e4c..d2e42a2 100644
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Install kaldifeat from source &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>Install kaldifeat from source &mdash; kaldifeat 1.25.2 documentation</title>
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       <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
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@@ -35,7 +35,7 @@
             kaldifeat
           </a>
               <div class="version">
-                1.25.1
+                1.25.2
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diff --git a/installation/from_wheels.html b/installation/from_wheels.html
index b371c79..a7072e8 100644
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>From pre-compiled wheels (Recommended) &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>From pre-compiled wheels (Recommended) &mdash; kaldifeat 1.25.2 documentation</title>
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       <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
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@@ -35,7 +35,7 @@
             kaldifeat
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-                1.25.1
+                1.25.2
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diff --git a/installation/index.html b/installation/index.html
index 1805708..71dc18f 100644
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@@ -4,7 +4,7 @@
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Installation &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>Installation &mdash; kaldifeat 1.25.2 documentation</title>
       <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
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@@ -35,7 +35,7 @@
             kaldifeat
           </a>
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-                1.25.1
+                1.25.2
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diff --git a/intro.html b/intro.html
index 31beb62..27254dd 100644
--- a/intro.html
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@@ -4,7 +4,7 @@
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Introduction &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>Introduction &mdash; kaldifeat 1.25.2 documentation</title>
       <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
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@@ -35,7 +35,7 @@
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-                1.25.1
+                1.25.2
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index 076ca9a..f0c39ae 100644
Binary files a/objects.inv and b/objects.inv differ
diff --git a/search.html b/search.html
index d458be9..1d3ffd5 100644
--- a/search.html
+++ b/search.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Search &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>Search &mdash; kaldifeat 1.25.2 documentation</title>
       <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
     
@@ -35,7 +35,7 @@
             kaldifeat
           </a>
               <div class="version">
-                1.25.1
+                1.25.2
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   <form id="rtd-search-form" class="wy-form" action="#" method="get">
diff --git a/usage/fbank.html b/usage/fbank.html
index c6e8708..6f3d1d5 100644
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@@ -4,7 +4,7 @@
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>kaldifeat.Fbank &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>kaldifeat.Fbank &mdash; kaldifeat 1.25.2 documentation</title>
       <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
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@@ -35,7 +35,7 @@
             kaldifeat
           </a>
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-                1.25.1
+                1.25.2
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diff --git a/usage/fbank_options.html b/usage/fbank_options.html
index 18778eb..9413be7 100644
--- a/usage/fbank_options.html
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@@ -4,7 +4,7 @@
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>kaldifeat.FbankOptions &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>kaldifeat.FbankOptions &mdash; kaldifeat 1.25.2 documentation</title>
       <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
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@@ -35,7 +35,7 @@
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-                1.25.1
+                1.25.2
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diff --git a/usage/index.html b/usage/index.html
index bd35f53..a8dbbb9 100644
--- a/usage/index.html
+++ b/usage/index.html
@@ -4,7 +4,7 @@
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Usage &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>Usage &mdash; kaldifeat 1.25.2 documentation</title>
       <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
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@@ -35,7 +35,7 @@
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+                1.25.2
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diff --git a/usage/online_fbank.html b/usage/online_fbank.html
index 0a2ee5b..a99ccec 100644
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@@ -4,7 +4,7 @@
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   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>kaldifeat.OnlineFbank &mdash; kaldifeat 1.25.1 documentation</title>
+  <title>kaldifeat.OnlineFbank &mdash; kaldifeat 1.25.2 documentation</title>
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       <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
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@@ -34,7 +34,7 @@
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+                1.25.2
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