diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 8088eb05f..3ecd0c09f 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -20,22 +20,22 @@ jobs:
         ports:
           - 8090:80
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up JDK 11
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
-          distribution: adopt-hotspot
+          distribution: temurin
           java-version: 11
       - name: Get Date
         id: get-date
         run: |
-          echo "::set-output name=date::$(/bin/date -u "+%Y-%m")"
+          echo "date=$(/bin/date -u "+%Y-%m")" >> "$GITHUB_OUTPUT"
         shell: bash
       - name: Cache Maven Repository
         id: cache-maven
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.m2/repository
           # refresh cache every month to avoid unlimited growth
diff --git a/.github/workflows/ci-publish.yml b/.github/workflows/ci-publish.yml
index db768c53f..b1841267b 100644
--- a/.github/workflows/ci-publish.yml
+++ b/.github/workflows/ci-publish.yml
@@ -15,22 +15,22 @@ jobs:
         ports:
           - 8090:80
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up JDK 11
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
-          distribution: adopt-hotspot
+          distribution: temurin
           java-version: 11
       - name: Get Date
         id: get-date
         run: |
-          echo "::set-output name=date::$(/bin/date -u "+%Y-%m")"
+          echo "date=$(/bin/date -u "+%Y-%m")" >> "$GITHUB_OUTPUT"
         shell: bash
       - name: Cache Maven Repository
         id: cache-maven
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.m2/repository
           # refresh cache every month to avoid unlimited growth
diff --git a/.mvn/wrapper/maven-wrapper.properties b/.mvn/wrapper/maven-wrapper.properties
index cc8a8a76a..a6fa87956 100644
--- a/.mvn/wrapper/maven-wrapper.properties
+++ b/.mvn/wrapper/maven-wrapper.properties
@@ -1,2 +1,2 @@
-distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.6.1/apache-maven-3.6.1-bin.zip
+distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.9.16/apache-maven-3.9.16-bin.zip
 
diff --git a/pom.xml b/pom.xml
index 1c8d985e0..62e209c22 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 	<groupId>org.gitlab4j</groupId>
 	<artifactId>gitlab4j-api-cortex</artifactId>
 	<packaging>jar</packaging>
-	<version>6.0.4</version>
+	<version>6.0.5</version>
 	<name>GitLab4J-API - GitLab API Java Client</name>
 	<description>GitLab4J-API (gitlab4j-api) provides a full featured Java client library for working with GitLab repositories and servers via the GitLab REST API.</description>
 	<url>https://github.com/gitlab4j/gitlab4j-api</url>
@@ -52,14 +52,14 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-		<jersey.version>3.1.1</jersey.version>
-		<jackson.version>2.14.1</jackson.version>
+		<jersey.version>3.1.12</jersey.version>
+		<jackson.version>2.21.8</jackson.version>
 		<servlet.version>6.0.0</servlet.version>
-		<activation.version>2.1.1</activation.version>
+		<activation.version>2.1.4</activation.version>
 
-		<junit.version>5.8.2</junit.version>
+		<junit.version>5.14.4</junit.version>
 		<testcontainers.version>1.15.3</testcontainers.version>
-		<mockito.version>4.4.0</mockito.version>
+		<mockito.version>4.11.0</mockito.version>
 		<hamcrest.version>1.3</hamcrest.version>
 		<systemRules.version>1.19.0</systemRules.version>
 
@@ -259,7 +259,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-enforcer-plugin</artifactId>
-				<version>3.0.0-M2</version>
+				<version>3.6.2</version>
 				<configuration>
 					<rules>
 						<enforceBytecodeVersion>
@@ -282,7 +282,7 @@
 					<dependency>
 						<groupId>org.codehaus.mojo</groupId>
 						<artifactId>extra-enforcer-rules</artifactId>
-						<version>1.3</version>
+						<version>1.12.1</version>
 					</dependency>
 				</dependencies>
 			</plugin>
@@ -389,13 +389,13 @@
 		<dependency>
 			<groupId>uk.org.webcompere</groupId>
 			<artifactId>system-stubs-jupiter</artifactId>
-			<version>1.2.0</version>
+			<version>2.1.8</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.jboss.resteasy</groupId>
 			<artifactId>resteasy-client</artifactId>
-			<version>6.2.3.Final</version>
+			<version>6.2.19.Final</version>
 		</dependency>
 		<dependency>
 			<groupId>net.ltgt.jaxrs</groupId>
@@ -411,12 +411,20 @@
 		<dependency>
 			<groupId>com.squareup.okhttp3</groupId>
 			<artifactId>okhttp</artifactId>
-			<version>4.9.3</version>
+			<version>4.12.0</version>
 		</dependency>
 	</dependencies>
 
 	<dependencyManagement>
 		<dependencies>
+			<!-- Align Jersey's transitive Jackson with the version brain-backend runs -->
+			<dependency>
+				<groupId>com.fasterxml.jackson</groupId>
+				<artifactId>jackson-bom</artifactId>
+				<version>${jackson.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
 			<!-- Needed for animal-sniffer -->
 			<dependency>
 				<groupId>org.codehaus.mojo.signature</groupId>
diff --git a/src/main/java/org/gitlab4j/api/utils/JacksonJson.java b/src/main/java/org/gitlab4j/api/utils/JacksonJson.java
index e30463bb7..2b6328c2d 100644
--- a/src/main/java/org/gitlab4j/api/utils/JacksonJson.java
+++ b/src/main/java/org/gitlab4j/api/utils/JacksonJson.java
@@ -33,7 +33,7 @@
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
-import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.module.SimpleModule;
@@ -59,7 +59,7 @@ public JacksonJson() {
         objectMapper = new ObjectMapper();
 
         objectMapper.setSerializationInclusion(Include.NON_NULL);
-        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
+        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE);
 
         objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
         objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
@@ -349,7 +349,7 @@ public List<User> deserialize(JsonParser jsonParser, DeserializationContext cont
     private static class JacksonJsonSingletonHelper {
         private static final JacksonJson JACKSON_JSON = new JacksonJson();
         static {
-            JACKSON_JSON.objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CAMEL_CASE);
+            JACKSON_JSON.objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.LOWER_CAMEL_CASE);
             JACKSON_JSON.objectMapper.setSerializationInclusion(Include.ALWAYS);
         }
     }