diff --git a/_modules/index.html b/_modules/index.html
index f492a67..3e7f001 100644
--- a/_modules/index.html
+++ b/_modules/index.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Overview: module code &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Overview: module code &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="../_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="../_static/css/theme.css" />
 
@@ -35,7 +35,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
diff --git a/_modules/parsedmarc.html b/_modules/parsedmarc.html
index 6cb8002..5e8307a 100644
--- a/_modules/parsedmarc.html
+++ b/_modules/parsedmarc.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>parsedmarc &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>parsedmarc &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="../_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="../_static/css/theme.css" />
 
@@ -35,7 +35,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
@@ -121,7 +121,7 @@
 <span class="kn">from</span> <span class="nn">parsedmarc.utils</span> <span class="kn">import</span> <span class="n">parse_email</span>
 <span class="kn">from</span> <span class="nn">parsedmarc.utils</span> <span class="kn">import</span> <span class="n">timestamp_to_human</span><span class="p">,</span> <span class="n">human_timestamp_to_datetime</span>
 
-<span class="n">__version__</span> <span class="o">=</span> <span class="s2">&quot;8.9.0&quot;</span>
+<span class="n">__version__</span> <span class="o">=</span> <span class="s2">&quot;8.9.1&quot;</span>
 
 <span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">&quot;parsedmarc v</span><span class="si">{0}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">__version__</span><span class="p">))</span>
 
diff --git a/_modules/parsedmarc/elastic.html b/_modules/parsedmarc/elastic.html
index beff2e6..8ccf378 100644
--- a/_modules/parsedmarc/elastic.html
+++ b/_modules/parsedmarc/elastic.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>parsedmarc.elastic &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>parsedmarc.elastic &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
 
@@ -35,7 +35,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="../../search.html" method="get">
diff --git a/_modules/parsedmarc/opensearch.html b/_modules/parsedmarc/opensearch.html
index 027114e..dcf800c 100644
--- a/_modules/parsedmarc/opensearch.html
+++ b/_modules/parsedmarc/opensearch.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>parsedmarc.opensearch &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>parsedmarc.opensearch &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
 
@@ -35,7 +35,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="../../search.html" method="get">
diff --git a/_modules/parsedmarc/splunk.html b/_modules/parsedmarc/splunk.html
index a242e70..ddc03bc 100644
--- a/_modules/parsedmarc/splunk.html
+++ b/_modules/parsedmarc/splunk.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>parsedmarc.splunk &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>parsedmarc.splunk &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
 
@@ -35,7 +35,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="../../search.html" method="get">
diff --git a/_modules/parsedmarc/utils.html b/_modules/parsedmarc/utils.html
index 673bab5..9e82332 100644
--- a/_modules/parsedmarc/utils.html
+++ b/_modules/parsedmarc/utils.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>parsedmarc.utils &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>parsedmarc.utils &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
 
@@ -35,7 +35,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="../../search.html" method="get">
diff --git a/_static/documentation_options.js b/_static/documentation_options.js
index db807cf..0865d9d 100644
--- a/_static/documentation_options.js
+++ b/_static/documentation_options.js
@@ -1,6 +1,6 @@
 var DOCUMENTATION_OPTIONS = {
     URL_ROOT: document.getElementById("documentation_options").getAttribute('data-url_root'),
-    VERSION: '8.9.0',
+    VERSION: '8.9.1',
     LANGUAGE: 'en',
     COLLAPSE_INDEX: false,
     BUILDER: 'html',
diff --git a/api.html b/api.html
index 312b644..e938ec4 100644
--- a/api.html
+++ b/api.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>API reference &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>API reference &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -37,7 +37,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/contributing.html b/contributing.html
index fd44c47..7c7944d 100644
--- a/contributing.html
+++ b/contributing.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Contributing to parsedmarc &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Contributing to parsedmarc &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/davmail.html b/davmail.html
index 6e9905b..0fb4001 100644
--- a/davmail.html
+++ b/davmail.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Accessing an inbox using OWA/EWS &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Accessing an inbox using OWA/EWS &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/dmarc.html b/dmarc.html
index df62a72..8dc9bdf 100644
--- a/dmarc.html
+++ b/dmarc.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Understanding DMARC &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Understanding DMARC &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/elasticsearch.html b/elasticsearch.html
index 6d551f0..c961693 100644
--- a/elasticsearch.html
+++ b/elasticsearch.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Elasticsearch and Kibana &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Elasticsearch and Kibana &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/genindex.html b/genindex.html
index d020d51..9990f3a 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; parsedmarc 8.9.0 documentation</title>
+  <title>Index &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -35,7 +35,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/index.html b/index.html
index 4526220..ab46630 100644
--- a/index.html
+++ b/index.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>parsedmarc documentation - Open source DMARC report analyzer and visualizer &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>parsedmarc documentation - Open source DMARC report analyzer and visualizer &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -37,7 +37,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/installation.html b/installation.html
index 3d496c8..183afb9 100644
--- a/installation.html
+++ b/installation.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Installation &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Installation &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
               </div>
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/kibana.html b/kibana.html
index 484a0e7..c832e9c 100644
--- a/kibana.html
+++ b/kibana.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Using the Kibana dashboards &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Using the Kibana dashboards &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
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 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/mailing-lists.html b/mailing-lists.html
index 7b86549..4df7ad4 100644
--- a/mailing-lists.html
+++ b/mailing-lists.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>What about mailing lists? &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>What about mailing lists? &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -36,7 +36,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
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 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/objects.inv b/objects.inv
index f4288c8..628f349 100644
--- a/objects.inv
+++ b/objects.inv
@@ -1,6 +1,6 @@
 # Sphinx inventory version 2
 # Project: parsedmarc
-# Version: 8.9.0
+# Version: 8.9.1
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diff --git a/opensearch.html b/opensearch.html
index 717bf2b..549b19c 100644
--- a/opensearch.html
+++ b/opensearch.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>OpenSearch and Grafana &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>OpenSearch and Grafana &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
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 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/output.html b/output.html
index d38bd86..d7d04ff 100644
--- a/output.html
+++ b/output.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Sample outputs &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Sample outputs &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
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 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/py-modindex.html b/py-modindex.html
index d3a0cb3..b813b0e 100644
--- a/py-modindex.html
+++ b/py-modindex.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Python Module Index &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Python Module Index &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
               <div class="version">
-                8.9.0
+                8.9.1
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   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
diff --git a/search.html b/search.html
index 3c8bbf8..1c515be 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; parsedmarc 8.9.0 documentation</title>
+  <title>Search &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
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-                8.9.0
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diff --git a/splunk.html b/splunk.html
index 0b77850..49f78aa 100644
--- a/splunk.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>Splunk &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Splunk &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
           </a>
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diff --git a/usage.html b/usage.html
index 6cffff0..9e33ef2 100644
--- a/usage.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>Using parsedmarc &mdash; parsedmarc 8.9.0 documentation</title>
+  <title>Using parsedmarc &mdash; parsedmarc 8.9.1 documentation</title>
       <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
       <link rel="stylesheet" type="text/css" href="_static/css/theme.css" />
 
@@ -38,7 +38,7 @@
             parsedmarc
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