diff --git a/.config/pmd/java/ruleset.xml b/.config/pmd/java/ruleset.xml
index 748c826..6bf58b3 100644
--- a/.config/pmd/java/ruleset.xml
+++ b/.config/pmd/java/ruleset.xml
@@ -2,7 +2,7 @@
 <ruleset name="Default"
 		 xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
 		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		 xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
+		 xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.github.io/ruleset_2_0_0.xsd">
 
 	<description>
 		This ruleset checks the code for discouraged programming constructs.
diff --git a/.github/workflows/broken-links.yml b/.github/workflows/broken-links.yml
index 5921f76..3a1009c 100644
--- a/.github/workflows/broken-links.yml
+++ b/.github/workflows/broken-links.yml
@@ -26,7 +26,7 @@ jobs:
       - name: Find already existing issue
         id: find-issue
         run: |
-          echo "number=$(gh issue list -l 'bug' -l 'automated' -L 1 -S 'in:title \"Link Checker Report\"' -s 'open' --json 'number' --jq '.[].number')" >> $GITHUB_OUTPUT
+          echo "number=$(gh issue list -l 'bug' -l 'automated' -L 1 -S 'in:title "Link Checker Report"' -s 'open' --json 'number' --jq '.[].number')" >> $GITHUB_OUTPUT
         env:
           GH_TOKEN: ${{ github.token }}
 
@@ -38,7 +38,7 @@ jobs:
 
       - name: Create Issue From File
         if: steps.lychee.outputs.exit_code != 0
-        uses: peter-evans/create-issue-from-file@e8ef132d6df98ed982188e460ebb3b5d4ef3a9cd # v5
+        uses: peter-evans/create-issue-from-file@fca9117c27cdc29c6c4db3b86c48e4115a786710 # v6
         with:
           issue-number: ${{ steps.find-issue.outputs.number }}
           title: Link Checker Report
diff --git a/.github/workflows/check-build.yml b/.github/workflows/check-build.yml
index 01f0840..e975764 100644
--- a/.github/workflows/check-build.yml
+++ b/.github/workflows/check-build.yml
@@ -28,7 +28,7 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        java: [17, 21]
+        java: [17, 21, 25]
         distribution: [temurin]
     steps:
     - uses: actions/checkout@v5
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9885e35..ea8ffdd 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -19,7 +19,7 @@ We also encourage you to read the [contribution instructions by GitHub](https://
 ### Software Requirements
 You should have the following things installed:
 * Git
-* Java 21 - should be as unmodified as possible (Recommended: [Eclipse Adoptium](https://adoptium.net/temurin/releases/))
+* Java 25 - should be as unmodified as possible (Recommended: [Eclipse Adoptium](https://adoptium.net/temurin/releases/))
 * Maven (Note that the [Maven Wrapper](https://maven.apache.org/wrapper/) is shipped with the repo)
 
 ### Recommended setup
diff --git a/pom.xml b/pom.xml
index de0e2d1..3053e48 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
 							<dependency>
 								<groupId>com.puppycrawl.tools</groupId>
 								<artifactId>checkstyle</artifactId>
-								<version>11.0.1</version>
+								<version>11.1.0</version>
 							</dependency>
 						</dependencies>
 						<configuration>
diff --git a/sessionize-java-client-demo/pom.xml b/sessionize-java-client-demo/pom.xml
index 0e36806..4948201 100644
--- a/sessionize-java-client-demo/pom.xml
+++ b/sessionize-java-client-demo/pom.xml
@@ -28,7 +28,7 @@
 
 		<mainClass>software.xdev.Application</mainClass>
 
-		<log4j2-version>2.25.1</log4j2-version>
+		<log4j2-version>2.25.2</log4j2-version>
 	</properties>
 
 	<dependencies>
diff --git a/sessionize-java-client/pom.xml b/sessionize-java-client/pom.xml
index a3753a4..cea14f1 100644
--- a/sessionize-java-client/pom.xml
+++ b/sessionize-java-client/pom.xml
@@ -73,7 +73,7 @@
 		<dependency>
 			<groupId>org.apache.httpcomponents.client5</groupId>
 			<artifactId>httpclient5</artifactId>
-			<version>5.5</version>
+			<version>5.5.1</version>
 		</dependency>
 
 		<!-- JSON processing: jackson -->
@@ -324,7 +324,7 @@
 					<plugin>
 						<groupId>org.openapitools</groupId>
 						<artifactId>openapi-generator-maven-plugin</artifactId>
-						<version>7.15.0</version>
+						<version>7.16.0</version>
 						<executions>
 							<execution>
 								<goals>
@@ -449,7 +449,7 @@
 							<dependency>
 								<groupId>com.puppycrawl.tools</groupId>
 								<artifactId>checkstyle</artifactId>
-								<version>11.0.1</version>
+								<version>11.1.0</version>
 							</dependency>
 						</dependencies>
 						<configuration>