diff --git a/docs/partials/index.html b/docs/partials/index.html
index 35e5bedf5..c8215d9dc 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 10.20.0, see
+                        (2022-09 or higher version) workspace. Latest release 10.20.1, see
                         <a href="#!/releasenotes">release notes</a>.
                     </small>
                 </div>
diff --git a/docs/partials/releases/10.20.1/release_notes.html b/docs/partials/releases/10.20.1/release_notes.html
new file mode 100644
index 000000000..6e9432527
--- /dev/null
+++ b/docs/partials/releases/10.20.1/release_notes.html
@@ -0,0 +1,16 @@
+<div>
+    <h3>Changes</h3>
+    <ul>
+        <li>79a02ed1 Issue #778: update to Checkstyle 10.20.1</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 09a569ae1..c0069a745 100644
--- a/docs/releases.json
+++ b/docs/releases.json
@@ -1,4 +1,9 @@
 [
+  {
+    "version": "Release 10.20.1",
+    "template": "partials/releases/10.20.1/release_notes.html",
+    "open": true
+  },
   {
     "version": "Release 10.20.0",
     "template": "partials/releases/10.20.0/release_notes.html",
diff --git a/docs/sitemap.xml b/docs/sitemap.xml
index 379c7d5e7..a0ac47b83 100644
--- a/docs/sitemap.xml
+++ b/docs/sitemap.xml
@@ -15,77 +15,77 @@
   -->
   <url>
     <loc>https://checkstyle.org/eclipse-cs/</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/releasenotes</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/install</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/project-setup</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/custom-config</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/filters</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/configtypes</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/properties</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/filesets</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/preferences</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/extensions</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/custom-checks</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/builtin-config</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/custom-filters</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
   <url>
     <loc>https://checkstyle.org/eclipse-cs/#!/faq</loc>
-    <lastmod>2024-11-05</lastmod>
+    <lastmod>2024-11-07</lastmod>
     <changefreq>weekly</changefreq>
   </url>
 </urlset>
diff --git a/net.sf.eclipsecs-feature/feature.xml b/net.sf.eclipsecs-feature/feature.xml
index 0fa90f4e0..68ff06165 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="10.20.0.qualifier"
+      version="10.20.1.qualifier"
       provider-name="%feature.provider_name"
       plugin="net.sf.eclipsecs.branding">
 
@@ -38,22 +38,22 @@
 
    <plugin
          id="net.sf.eclipsecs.branding"
-         version="10.20.0.qualifier"/>
+         version="10.20.1.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.core"
-         version="10.20.0.qualifier"/>
+         version="10.20.1.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.doc"
-         version="10.20.0.qualifier"/>
+         version="10.20.1.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.checkstyle"
-         version="10.20.0.qualifier"/>
+         version="10.20.1.qualifier"/>
 
    <plugin
          id="net.sf.eclipsecs.ui"
-         version="10.20.0.qualifier"/>
+         version="10.20.1.qualifier"/>
 
 </feature>
diff --git a/net.sf.eclipsecs-feature/pom.xml b/net.sf.eclipsecs-feature/pom.xml
index 0a76202c1..384f2a539 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 d5ad68a33..c2a1ce6dc 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_10.20.0.qualifier.jar" id="net.sf.eclipsecs" version="10.20.0.qualifier">
+   <feature url="features/net.sf.eclipsecs_10.20.1.qualifier.jar" id="net.sf.eclipsecs" version="10.20.1.qualifier">
       <category name="Checkstyle"/>
    </feature>
-   <feature url="features/net.sf.eclipsecs.source_10.20.0.qualifier.jar" id="net.sf.eclipsecs.source" version="10.20.0.qualifier">
+   <feature url="features/net.sf.eclipsecs.source_10.20.1.qualifier.jar" id="net.sf.eclipsecs.source" version="10.20.1.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 a42a1c3ba..21792afe0 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 5b65623a5..bf5bbf911 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: 10.20.0.qualifier
+Bundle-Version: 10.20.1.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 4d4a722e0..1e0b89c41 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 bd6a28bab..be38a0f07 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: 10.20.0.qualifier
+Bundle-Version: 10.20.1.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 4d4bb6e58..57be92262 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 170806a43..f4dd8541a 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: 10.20.0.qualifier
+Bundle-Version: 10.20.1.qualifier
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ClassPath: .,
  lib/checkstyle-10.20.1-all.jar
diff --git a/net.sf.eclipsecs.core/pom.xml b/net.sf.eclipsecs.core/pom.xml
index fd4d441a9..e253e19cc 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 843d486fb..e7aa06ab7 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: 10.20.0.qualifier
+Bundle-Version: 10.20.1.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 c1fbc9e86..c641c9e0c 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 35e5bedf5..c8215d9dc 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 10.20.0, see
+                        (2022-09 or higher version) workspace. Latest release 10.20.1, see
                         <a href="#!/releasenotes">release notes</a>.
                     </small>
                 </div>
diff --git a/net.sf.eclipsecs.doc/src/main/resources/partials/releases/10.20.1/release_notes.html b/net.sf.eclipsecs.doc/src/main/resources/partials/releases/10.20.1/release_notes.html
new file mode 100644
index 000000000..6e9432527
--- /dev/null
+++ b/net.sf.eclipsecs.doc/src/main/resources/partials/releases/10.20.1/release_notes.html
@@ -0,0 +1,16 @@
+<div>
+    <h3>Changes</h3>
+    <ul>
+        <li>79a02ed1 Issue #778: update to Checkstyle 10.20.1</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 09a569ae1..c0069a745 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 10.20.1",
+    "template": "partials/releases/10.20.1/release_notes.html",
+    "open": true
+  },
   {
     "version": "Release 10.20.0",
     "template": "partials/releases/10.20.0/release_notes.html",
diff --git a/net.sf.eclipsecs.sample/META-INF/MANIFEST.MF b/net.sf.eclipsecs.sample/META-INF/MANIFEST.MF
index d2961a401..91168bab9 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: 10.20.0.qualifier
+Bundle-Version: 10.20.1.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 57b91a4e7..d9391c6c7 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 bee8bc691..a8d9770d1 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-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 d44760bca..0bb578e10 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: 10.20.0.qualifier
+Bundle-Version: 10.20.1.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 fa338e943..2ba7ee842 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>10.20.0-SNAPSHOT</version>
+        <version>10.20.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>net.sf.eclipsecs.ui</artifactId>
diff --git a/pom.xml b/pom.xml
index 5ae857a0a..6abc6ef66 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>10.20.0-SNAPSHOT</version>
+    <version>10.20.1-SNAPSHOT</version>
     <packaging>pom</packaging>
     <name>eclipse-cs Maven Parent</name>