diff --git a/docs/partials/index.html b/docs/partials/index.html
index 19bd10088..35e5bedf5 100644
--- a/docs/partials/index.html
+++ b/docs/partials/index.html
@@ -24,7 +24,7 @@ <h1>Eclipse Checkstyle Plugin</h1>
                     <small>
                         <sup>1 </sup>
                         Install via Eclipse Marketplace. Drag and drop this link into a running Eclipse
-                        (2022-09 or higher version) workspace. Latest release 10.19.0, see
+                        (2022-09 or higher version) workspace. Latest release 10.20.0, see
                         <a href="#!/releasenotes">release notes</a>.
                     </small>
                 </div>
diff --git a/docs/partials/releases/10.20.0/release_notes.html b/docs/partials/releases/10.20.0/release_notes.html
new file mode 100644
index 000000000..29d4d9858
--- /dev/null
+++ b/docs/partials/releases/10.20.0/release_notes.html
@@ -0,0 +1,16 @@
+<div>
+    <h3>Changes</h3>
+    <ul>
+        <li>279d4b3b Issue #772: update to Checkstyle 10.20.0</li>
+    </ul>
+    
+    <p>
+        Please read the
+        <a target="_blank" href="https://checkstyle.org/releasenotes.html">
+            Checkstyle release notes
+        </a>
+        for details on recent and potentially breaking changes in Checkstyle.
+        Checkstyle configuration files potentially
+        need to be adapted to this version.
+    </p>
+</div>
diff --git a/docs/releases.json b/docs/releases.json
index 051d55ae1..09a569ae1 100644
--- a/docs/releases.json
+++ b/docs/releases.json
@@ -1,4 +1,9 @@
 [
+  {
+    "version": "Release 10.20.0",
+    "template": "partials/releases/10.20.0/release_notes.html",
+    "open": true
+  },
   {
     "version": "Release 10.19.0",
     "template": "partials/releases/10.19.0/release_notes.html",
diff --git a/docs/sitemap.xml b/docs/sitemap.xml
index dad743d3d..379c7d5e7 100644
--- a/docs/sitemap.xml
+++ b/docs/sitemap.xml
@@ -15,77 +15,77 @@
   -->
   <url>
     <loc>https://checkstyle.org/eclipse-cs/</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/releasenotes</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/install</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/project-setup</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/custom-config</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/filters</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/configtypes</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/properties</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/filesets</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/preferences</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/extensions</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/custom-checks</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/builtin-config</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/custom-filters</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/faq</loc>
-    <lastmod>2024-10-15</lastmod>
+    <lastmod>2024-11-05</lastmod>
     <changefreq>weekly</changefreq>
   </url>
 </urlset>
diff --git a/net.sf.eclipsecs-feature/feature.xml b/net.sf.eclipsecs-feature/feature.xml
index dc797d342..0fa90f4e0 100644
--- a/net.sf.eclipsecs-feature/feature.xml
+++ b/net.sf.eclipsecs-feature/feature.xml
@@ -2,7 +2,7 @@
 <feature
       id="net.sf.eclipsecs"
       label="%feature.label"
-      version="10.19.0.qualifier"
+      version="10.20.0.qualifier"
       provider-name="%feature.provider_name"
       plugin="net.sf.eclipsecs.branding">
 
@@ -38,22 +38,22 @@
 
    <plugin
          id="net.sf.eclipsecs.branding"
-         version="10.19.0.qualifier"/>
+         version="10.20.0.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.core"
-         version="10.19.0.qualifier"/>
+         version="10.20.0.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.doc"
-         version="10.19.0.qualifier"/>
+         version="10.20.0.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.checkstyle"
-         version="10.19.0.qualifier"/>
+         version="10.20.0.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.ui"
-         version="10.19.0.qualifier"/>
+         version="10.20.0.qualifier"/>
 
 </feature>
diff --git a/net.sf.eclipsecs-feature/pom.xml b/net.sf.eclipsecs-feature/pom.xml
index 21905b182..0a76202c1 100644
--- a/net.sf.eclipsecs-feature/pom.xml
+++ b/net.sf.eclipsecs-feature/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs</artifactId>
diff --git a/net.sf.eclipsecs-updatesite/category.xml b/net.sf.eclipsecs-updatesite/category.xml
index fed0a0ffe..d5ad68a33 100644
--- a/net.sf.eclipsecs-updatesite/category.xml
+++ b/net.sf.eclipsecs-updatesite/category.xml
@@ -3,10 +3,10 @@
    <description name="Eclipse Checkstyle Plugin" url="http://eclipse-cs.sourceforge.net/update">
       Eclipse Checkstyle Plugin Update Site
    </description>
-   <feature url="features/net.sf.eclipsecs_10.19.0.qualifier.jar" id="net.sf.eclipsecs" version="10.19.0.qualifier">
+   <feature url="features/net.sf.eclipsecs_10.20.0.qualifier.jar" id="net.sf.eclipsecs" version="10.20.0.qualifier">
       <category name="Checkstyle"/>
    </feature>
-   <feature url="features/net.sf.eclipsecs.source_10.19.0.qualifier.jar" id="net.sf.eclipsecs.source" version="10.19.0.qualifier">
+   <feature url="features/net.sf.eclipsecs.source_10.20.0.qualifier.jar" id="net.sf.eclipsecs.source" version="10.20.0.qualifier">
       <category name="Checkstyle"/>
    </feature>
    <category-def name="Checkstyle" label="Checkstyle">
diff --git a/net.sf.eclipsecs-updatesite/pom.xml b/net.sf.eclipsecs-updatesite/pom.xml
index 9ac096f0f..a42a1c3ba 100644
--- a/net.sf.eclipsecs-updatesite/pom.xml
+++ b/net.sf.eclipsecs-updatesite/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs-updatesite</artifactId>
diff --git a/net.sf.eclipsecs.branding/META-INF/MANIFEST.MF b/net.sf.eclipsecs.branding/META-INF/MANIFEST.MF
index 5e2b8eef9..5b65623a5 100644
--- a/net.sf.eclipsecs.branding/META-INF/MANIFEST.MF
+++ b/net.sf.eclipsecs.branding/META-INF/MANIFEST.MF
@@ -2,6 +2,6 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Bundle-Name
 Bundle-SymbolicName: net.sf.eclipsecs.branding
-Bundle-Version: 10.19.0.qualifier
+Bundle-Version: 10.20.0.qualifier
 Bundle-Vendor: %Bundle-Vendor
 Automatic-Module-Name: net.sf.eclipsecs.branding
diff --git a/net.sf.eclipsecs.branding/pom.xml b/net.sf.eclipsecs.branding/pom.xml
index c4967d217..4d4a722e0 100644
--- a/net.sf.eclipsecs.branding/pom.xml
+++ b/net.sf.eclipsecs.branding/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs.branding</artifactId>
diff --git a/net.sf.eclipsecs.checkstyle/META-INF/MANIFEST.MF b/net.sf.eclipsecs.checkstyle/META-INF/MANIFEST.MF
index e9a607bb5..fd4b17368 100644
--- a/net.sf.eclipsecs.checkstyle/META-INF/MANIFEST.MF
+++ b/net.sf.eclipsecs.checkstyle/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Bundle-Name
 Bundle-SymbolicName: net.sf.eclipsecs.checkstyle
-Bundle-Version: 10.19.0.qualifier
+Bundle-Version: 10.20.0.qualifier
 Bundle-Vendor: %Bundle-Vendor
 Bundle-ActivationPolicy: lazy
 Bundle-RequiredExecutionEnvironment: JavaSE-17
diff --git a/net.sf.eclipsecs.checkstyle/pom.xml b/net.sf.eclipsecs.checkstyle/pom.xml
index 01c86f5b8..620bf2a12 100644
--- a/net.sf.eclipsecs.checkstyle/pom.xml
+++ b/net.sf.eclipsecs.checkstyle/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs.checkstyle</artifactId>
diff --git a/net.sf.eclipsecs.core/META-INF/MANIFEST.MF b/net.sf.eclipsecs.core/META-INF/MANIFEST.MF
index 452469be9..39909d46f 100644
--- a/net.sf.eclipsecs.core/META-INF/MANIFEST.MF
+++ b/net.sf.eclipsecs.core/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-Name: %Bundle-Name
 Bundle-ManifestVersion: 2
 Bundle-SymbolicName: net.sf.eclipsecs.core;singleton:=true
-Bundle-Version: 10.19.0.qualifier
+Bundle-Version: 10.20.0.qualifier
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ClassPath: .,
  lib/checkstyle-10.20.0-all.jar
diff --git a/net.sf.eclipsecs.core/pom.xml b/net.sf.eclipsecs.core/pom.xml
index 8c0df381f..fd4d441a9 100644
--- a/net.sf.eclipsecs.core/pom.xml
+++ b/net.sf.eclipsecs.core/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs.core</artifactId>
diff --git a/net.sf.eclipsecs.doc/META-INF/MANIFEST.MF b/net.sf.eclipsecs.doc/META-INF/MANIFEST.MF
index d33e2a3f0..843d486fb 100644
--- a/net.sf.eclipsecs.doc/META-INF/MANIFEST.MF
+++ b/net.sf.eclipsecs.doc/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Bundle-Name
 Bundle-SymbolicName: net.sf.eclipsecs.doc;singleton:=true
-Bundle-Version: 10.19.0.qualifier
+Bundle-Version: 10.20.0.qualifier
 Require-Bundle: org.eclipse.help;bundle-version="3.9.0"
 Bundle-Vendor: %Bundle-Vendor
 Automatic-Module-Name: net.sf.eclipsecs.doc
diff --git a/net.sf.eclipsecs.doc/pom.xml b/net.sf.eclipsecs.doc/pom.xml
index e6bc34ae4..c1fbc9e86 100644
--- a/net.sf.eclipsecs.doc/pom.xml
+++ b/net.sf.eclipsecs.doc/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs.doc</artifactId>
diff --git a/net.sf.eclipsecs.doc/src/main/resources/partials/index.html b/net.sf.eclipsecs.doc/src/main/resources/partials/index.html
index 19bd10088..35e5bedf5 100644
--- a/net.sf.eclipsecs.doc/src/main/resources/partials/index.html
+++ b/net.sf.eclipsecs.doc/src/main/resources/partials/index.html
@@ -24,7 +24,7 @@ <h1>Eclipse Checkstyle Plugin</h1>
                     <small>
                         <sup>1 </sup>
                         Install via Eclipse Marketplace. Drag and drop this link into a running Eclipse
-                        (2022-09 or higher version) workspace. Latest release 10.19.0, see
+                        (2022-09 or higher version) workspace. Latest release 10.20.0, see
                         <a href="#!/releasenotes">release notes</a>.
                     </small>
                 </div>
diff --git a/net.sf.eclipsecs.doc/src/main/resources/partials/releases/10.20.0/release_notes.html b/net.sf.eclipsecs.doc/src/main/resources/partials/releases/10.20.0/release_notes.html
new file mode 100644
index 000000000..29d4d9858
--- /dev/null
+++ b/net.sf.eclipsecs.doc/src/main/resources/partials/releases/10.20.0/release_notes.html
@@ -0,0 +1,16 @@
+<div>
+    <h3>Changes</h3>
+    <ul>
+        <li>279d4b3b Issue #772: update to Checkstyle 10.20.0</li>
+    </ul>
+    
+    <p>
+        Please read the
+        <a target="_blank" href="https://checkstyle.org/releasenotes.html">
+            Checkstyle release notes
+        </a>
+        for details on recent and potentially breaking changes in Checkstyle.
+        Checkstyle configuration files potentially
+        need to be adapted to this version.
+    </p>
+</div>
diff --git a/net.sf.eclipsecs.doc/src/main/resources/releases.json b/net.sf.eclipsecs.doc/src/main/resources/releases.json
index 051d55ae1..09a569ae1 100644
--- a/net.sf.eclipsecs.doc/src/main/resources/releases.json
+++ b/net.sf.eclipsecs.doc/src/main/resources/releases.json
@@ -1,4 +1,9 @@
 [
+  {
+    "version": "Release 10.20.0",
+    "template": "partials/releases/10.20.0/release_notes.html",
+    "open": true
+  },
   {
     "version": "Release 10.19.0",
     "template": "partials/releases/10.19.0/release_notes.html",
diff --git a/net.sf.eclipsecs.sample/META-INF/MANIFEST.MF b/net.sf.eclipsecs.sample/META-INF/MANIFEST.MF
index aa0b3da89..d2961a401 100644
--- a/net.sf.eclipsecs.sample/META-INF/MANIFEST.MF
+++ b/net.sf.eclipsecs.sample/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Bundle-Name
 Bundle-SymbolicName: net.sf.eclipsecs.sample;singleton:=true
-Bundle-Version: 10.19.0.qualifier
+Bundle-Version: 10.20.0.qualifier
 Require-Bundle: net.sf.eclipsecs.checkstyle,
  net.sf.eclipsecs.core,
  net.sf.eclipsecs.ui
diff --git a/net.sf.eclipsecs.sample/pom.xml b/net.sf.eclipsecs.sample/pom.xml
index 149595271..57b91a4e7 100644
--- a/net.sf.eclipsecs.sample/pom.xml
+++ b/net.sf.eclipsecs.sample/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs.sample</artifactId>
diff --git a/net.sf.eclipsecs.target/pom.xml b/net.sf.eclipsecs.target/pom.xml
index d66fbeca3..bee8bc691 100644
--- a/net.sf.eclipsecs.target/pom.xml
+++ b/net.sf.eclipsecs.target/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <artifactId>net.sf.eclipsecs.target</artifactId>
     <packaging>pom</packaging>
diff --git a/net.sf.eclipsecs.ui/META-INF/MANIFEST.MF b/net.sf.eclipsecs.ui/META-INF/MANIFEST.MF
index 8bd56df8a..d44760bca 100644
--- a/net.sf.eclipsecs.ui/META-INF/MANIFEST.MF
+++ b/net.sf.eclipsecs.ui/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Bundle-Name
 Bundle-SymbolicName: net.sf.eclipsecs.ui;singleton:=true
-Bundle-Version: 10.19.0.qualifier
+Bundle-Version: 10.20.0.qualifier
 Bundle-Vendor: %Bundle-Vendor
 Bundle-Activator: net.sf.eclipsecs.ui.CheckstyleUIPlugin
 Bundle-ActivationPolicy: lazy
diff --git a/net.sf.eclipsecs.ui/pom.xml b/net.sf.eclipsecs.ui/pom.xml
index 20b641477..fa338e943 100644
--- a/net.sf.eclipsecs.ui/pom.xml
+++ b/net.sf.eclipsecs.ui/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>net.sf.eclipsecs.parent</artifactId>
         <groupId>net.sf.eclipsecs</groupId>
-        <version>10.19.0-SNAPSHOT</version>
+        <version>10.20.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs.ui</artifactId>
diff --git a/pom.xml b/pom.xml
index 9eea9663b..5ae857a0a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.sf.eclipsecs</groupId>
     <artifactId>net.sf.eclipsecs.parent</artifactId>
-    <version>10.19.0-SNAPSHOT</version>
+    <version>10.20.0-SNAPSHOT</version>
     <packaging>pom</packaging>
     <name>eclipse-cs Maven Parent</name>