diff --git a/.config/pmd/java/ruleset.xml b/.config/pmd/java/ruleset.xml
index d51fbb59..4d095dbd 100644
--- a/.config/pmd/java/ruleset.xml
+++ b/.config/pmd/java/ruleset.xml
@@ -195,7 +195,55 @@
 
 	<rule ref="category/java/security.xml"/>
 
-	<rule name="VaadinNativeHTMLUnsafe"
+	<rule name="AvoidSystemSetterCall"
+		  language="java"
+		  message="Setters of java.lang.System should not be called unless really needed"
+		  class="net.sourceforge.pmd.lang.rule.xpath.XPathRule">
+		<description>
+			Calling setters of java.lang.System usually indicates bad design and likely causes unexpected behavior.
+			For example, it may break when multiple Threads are setting the value.
+			It may also overwrite user defined options or properties.
+
+			Try to pass the value only to the place where it's really needed and use it there accordingly.
+		</description>
+		<priority>3</priority>
+		<properties>
+			<property name="xpath">
+				<value>
+					<![CDATA[
+//MethodCall[starts-with(@MethodName,'set')]/TypeExpression[pmd-java:typeIsExactly('java.lang.System')]
+]]>
+				</value>
+			</property>
+		</properties>
+	</rule>
+
+	<rule name="JavaObjectSerializationIsUnsafe"
+		  language="java"
+		  message="Using Java Object (De-)Serialization is unsafe and has led to too many security vulnerabilities"
+		  class="net.sourceforge.pmd.lang.rule.xpath.XPathRule">
+		<description>
+			Nearly every known usage of (Java) Object Deserialization has resulted in [a security vulnerability](https://cloud.google.com/blog/topics/threat-intelligence/hunting-deserialization-exploits?hl=en).
+			Vulnerabilities are so common that there are [dedicated projects for exploit payload generation](https://github.com/frohoff/ysoserial).
+
+			Java Object Serialization may also fail to deserialize when the underlying classes are changed.
+
+			Use proven data interchange formats like JSON instead.
+		</description>
+		<priority>2</priority>
+		<properties>
+			<property name="xpath">
+				<value>
+					<![CDATA[
+//ClassDeclaration[@Interface = false()]/ClassBody/FieldDeclaration/VariableDeclarator/VariableId[@Name='serialVersionUID'] |
+//ConstructorCall/ClassType[pmd-java:typeIsExactly('java.io.ObjectInputStream') or pmd-java:typeIsExactly('java.io.ObjectOutputStream')]
+]]>
+				</value>
+			</property>
+		</properties>
+	</rule>
+
+	<rule name="VaadinNativeHTMLIsUnsafe"
 		language="java"
 		message="Unescaped native HTML is unsafe and will result in XSS vulnerabilities"
 		class="net.sourceforge.pmd.lang.rule.xpath.XPathRule" >
diff --git a/.github/workflows/broken-links.yml b/.github/workflows/broken-links.yml
index d5095397..a37abe70 100644
--- a/.github/workflows/broken-links.yml
+++ b/.github/workflows/broken-links.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - run: mv .github/.lycheeignore .lycheeignore
 
diff --git a/.github/workflows/check-build.yml b/.github/workflows/check-build.yml
index 534c66f4..548a614c 100644
--- a/.github/workflows/check-build.yml
+++ b/.github/workflows/check-build.yml
@@ -33,7 +33,7 @@ jobs:
         distribution: [temurin]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       
     - name: Set up JDK
       uses: actions/setup-java@v4
@@ -90,7 +90,7 @@ jobs:
         distribution: [temurin]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       
     - name: Set up JDK
       uses: actions/setup-java@v4
@@ -113,7 +113,7 @@ jobs:
         distribution: [temurin]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Set up JDK
       uses: actions/setup-java@v4
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 89fd50a8..544186f9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       
     - name: Set up JDK
       uses: actions/setup-java@v4
@@ -50,7 +50,7 @@ jobs:
     outputs:
       upload_url: ${{ steps.create-release.outputs.upload_url }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       
     - name: Configure Git
       run: |
@@ -117,7 +117,7 @@ jobs:
     needs: [prepare-release]
     timeout-minutes: 60
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     
     - name: Init Git and pull
       run: |
@@ -173,7 +173,7 @@ jobs:
     needs: [prepare-release]
     timeout-minutes: 15
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       
     - name: Init Git and pull
       run: |
@@ -213,7 +213,7 @@ jobs:
     needs: [publish-maven]
     timeout-minutes: 10
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       
     - name: Init Git and pull
       run: |
diff --git a/.github/workflows/sync-labels.yml b/.github/workflows/sync-labels.yml
index dc672877..f6c50a17 100644
--- a/.github/workflows/sync-labels.yml
+++ b/.github/workflows/sync-labels.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           sparse-checkout: .github/labels.yml
 
diff --git a/.github/workflows/test-deploy.yml b/.github/workflows/test-deploy.yml
index a25242c5..2d943e11 100644
--- a/.github/workflows/test-deploy.yml
+++ b/.github/workflows/test-deploy.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Set up JDK
       uses: actions/setup-java@v4
diff --git a/.github/workflows/update-from-template.yml b/.github/workflows/update-from-template.yml
index bfa8ac98..28bc32c6 100644
--- a/.github/workflows/update-from-template.yml
+++ b/.github/workflows/update-from-template.yml
@@ -36,7 +36,7 @@ jobs:
       update_branch_merged_commit: ${{ steps.manage-branches.outputs.update_branch_merged_commit }}
       create_update_branch_merged_pr: ${{ steps.manage-branches.outputs.create_update_branch_merged_pr }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           # Required because otherwise there are always changes detected when executing diff/rev-list
           fetch-depth: 0
@@ -183,7 +183,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           # Required because otherwise there are always changes detected when executing diff/rev-list
           fetch-depth: 0
diff --git a/.gitignore b/.gitignore
index 69325d5f..16000c37 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,6 +66,7 @@ vite.generated.ts
 !.idea/saveactions_settings.xml
 !.idea/checkstyle-idea.xml
 !.idea/externalDependencies.xml
+!.idea/PMDPlugin.xml
 
 !.idea/inspectionProfiles/
 .idea/inspectionProfiles/*
diff --git a/.idea/PMDPlugin.xml b/.idea/PMDPlugin.xml
new file mode 100644
index 00000000..0936e518
--- /dev/null
+++ b/.idea/PMDPlugin.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PMDPlugin">
+    <option name="customRuleSets">
+      <list>
+        <option value="$PROJECT_DIR$\.config\pmd\java\ruleset.xml" />
+      </list>
+    </option>
+    <option name="inEditorAnnotationRules">
+      <list>
+        <option value="$PROJECT_DIR$\.config\pmd\java\ruleset.xml" />
+      </list>
+    </option>
+    <option name="skipTestSources" value="false" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/saveactions_settings.xml b/.idea/saveactions_settings.xml
index 848c311a..12a4f040 100644
--- a/.idea/saveactions_settings.xml
+++ b/.idea/saveactions_settings.xml
@@ -5,6 +5,7 @@
       <set>
         <option value="activate" />
         <option value="activateOnBatch" />
+        <option value="processAsync" />
         <option value="organizeImports" />
         <option value="reformatChangedCode" />
         <option value="fieldCanBeFinal" />
diff --git a/flow-demo/pom.xml b/flow-demo/pom.xml
index 9fd560b3..ab7912d5 100644
--- a/flow-demo/pom.xml
+++ b/flow-demo/pom.xml
@@ -29,7 +29,7 @@
 		<mainClass>software.xdev.vaadin.Application</mainClass>
 
 		<!-- Dependency-Versions -->
-		<vaadin.version>24.8.5</vaadin.version>
+		<vaadin.version>24.8.6</vaadin.version>
 
 		<org.springframework.boot.version>3.5.4</org.springframework.boot.version>
 	</properties>
diff --git a/flow/pom.xml b/flow/pom.xml
index 981f8988..eaa32541 100644
--- a/flow/pom.xml
+++ b/flow/pom.xml
@@ -49,7 +49,7 @@
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
 		<!-- Dependency-Versions -->
-		<vaadin.version>24.8.5</vaadin.version>
+		<vaadin.version>24.8.6</vaadin.version>
 	</properties>
 
 	<dependencyManagement>