diff --git a/docs/getting-started.html b/docs/getting-started.html
index d22686c2..e7ee21dd 100644
--- a/docs/getting-started.html
+++ b/docs/getting-started.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page">
diff --git a/docs/glossary.html b/docs/glossary.html
index a6d9f306..01058e51 100644
--- a/docs/glossary.html
+++ b/docs/glossary.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page"><a href="/docs/getting-started">Getting started</a>
diff --git a/docs/grammar.html b/docs/grammar.html
index b153a001..2c530727 100644
--- a/docs/grammar.html
+++ b/docs/grammar.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page"><a href="/docs/getting-started">Getting started</a>
diff --git a/docs/how-to-grammar-good.html b/docs/how-to-grammar-good.html
index 66370002..d1a80fd2 100644
--- a/docs/how-to-grammar-good.html
+++ b/docs/how-to-grammar-good.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page"><a href="/docs/getting-started">Getting started</a>
diff --git a/docs/index.html b/docs/index.html
index fc044d82..68d482e9 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page">
             <a href="#" class="page-title-active">Home</a>
diff --git a/docs/parser.html b/docs/parser.html
index 3bdacbee..7ddd7e78 100644
--- a/docs/parser.html
+++ b/docs/parser.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page"><a href="/docs/getting-started">Getting started</a>
diff --git a/docs/tokenizers.html b/docs/tokenizers.html
index 7c355159..ecf805b3 100644
--- a/docs/tokenizers.html
+++ b/docs/tokenizers.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page"><a href="/docs/getting-started">Getting started</a>
diff --git a/docs/tooling.html b/docs/tooling.html
index 51a060ca..e9313c93 100644
--- a/docs/tooling.html
+++ b/docs/tooling.html
@@ -251,7 +251,7 @@
 
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 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page"><a href="/docs/getting-started">Getting started</a>
diff --git a/docs/using-in-frontend.html b/docs/using-in-frontend.html
index 78c517c0..b9c8134d 100644
--- a/docs/using-in-frontend.html
+++ b/docs/using-in-frontend.html
@@ -251,7 +251,7 @@
 
 <a href="https://github.com/kach/nearley" class="github-corner"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page"><a href="/docs/index">Home</a>
         <li class="page"><a href="/docs/getting-started">Getting started</a>
diff --git a/index.html b/index.html
index fc044d82..68d482e9 100644
--- a/index.html
+++ b/index.html
@@ -251,7 +251,7 @@
 
 <a href="https://github.com/kach/nearley" class="github-corner"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
 <nav id="nav">
-    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.19.9</span></a></h1>
+    <h1><a href="/">nearley<span style="color: #559;">.js</span><span id="version">2.20.0</span></a></h1>
     <ul>
         <li class="page">
             <a href="#" class="page-title-active">Home</a>