diff --git a/README.md b/README.md
index fff8b844..80a7b5f9 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,5 @@
 # Gitlab Java API Wrapper
 
-[![Maven Central](https://img.shields.io/maven-central/v/org.gitlab/java-gitlab-api.svg)](http://mvnrepository.com/artifact/org.gitlab/java-gitlab-api)
-[![Build Status](https://travis-ci.org/timols/java-gitlab-api.svg?branch=master)](https://travis-ci.org/timols/java-gitlab-api)
 A wrapper for the [Gitlab API](https://gitlab.org) written in Java.
 
 [Documentation](https://timols.github.io/java-gitlab-api) is available in the form of [Javadocs](https://timols.github.io/java-gitlab-api)
diff --git a/build.gradle b/build.gradle
index a9820738..ffac0acd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,10 +23,10 @@ repositories {
 }
 
 dependencies {
-	compile(group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.5.+')
-	compile(group: 'commons-io', name: 'commons-io', version: '2.4')
+	compile(group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.15.2')
+	compile(group: 'commons-io', name: 'commons-io', version: '2.14.0')
 	testCompile(group: 'org.hamcrest', name: 'hamcrest-all', version: '1.3')
-	testCompile(group: 'junit', name: 'junit', version: '4.12')
+	testCompile(group: 'junit', name: 'junit', version: '4.13.1')
 }
 
 jar {
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index b5166dad..a5fe1cb9 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index c1c608ef..be280bec 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Wed May 13 23:55:44 CEST 2015
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.5-bin.zip
diff --git a/gradlew b/gradlew
index 91a7e269..cccdd3d5 100755
--- a/gradlew
+++ b/gradlew
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 ##############################################################################
 ##
@@ -6,20 +6,38 @@
 ##
 ##############################################################################
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
 
 APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
-warn ( ) {
+warn () {
     echo "$*"
 }
 
-die ( ) {
+die () {
     echo
     echo "$*"
     echo
@@ -30,6 +48,7 @@ die ( ) {
 cygwin=false
 msys=false
 darwin=false
+nonstop=false
 case "`uname`" in
   CYGWIN* )
     cygwin=true
@@ -40,31 +59,11 @@ case "`uname`" in
   MINGW* )
     msys=true
     ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
 esac
 
-# For Cygwin, ensure paths are in UNIX format before anything is touched.
-if $cygwin ; then
-    [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
-fi
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >&-
-APP_HOME="`pwd -P`"
-cd "$SAVED" >&-
-
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 # Determine the Java command to use to start the JVM.
@@ -90,7 +89,7 @@ location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
     MAX_FD_LIMIT=`ulimit -H -n`
     if [ $? -eq 0 ] ; then
         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
@@ -114,6 +113,7 @@ fi
 if $cygwin ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
     ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
@@ -154,11 +154,19 @@ if $cygwin ; then
     esac
 fi
 
-# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
-function splitJvmOpts() {
-    JVM_OPTS=("$@")
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
 }
-eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
-JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
 
-exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
index aec99730..e95643d6 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -8,14 +8,14 @@
 @rem Set local scope for the variables with windows NT shell
 if "%OS%"=="Windows_NT" setlocal
 
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
-
 set DIRNAME=%~dp0
 if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 
@@ -46,10 +46,9 @@ echo location of your Java installation.
 goto fail
 
 :init
-@rem Get command-line arguments, handling Windowz variants
+@rem Get command-line arguments, handling Windows variants
 
 if not "%OS%" == "Windows_NT" goto win9xME_args
-if "%@eval[2+2]" == "4" goto 4NT_args
 
 :win9xME_args
 @rem Slurp the command line arguments.
@@ -60,11 +59,6 @@ set _SKIP=2
 if "x%~1" == "x" goto execute
 
 set CMD_LINE_ARGS=%*
-goto execute
-
-:4NT_args
-@rem Get arguments from the 4NT Shell from JP Software
-set CMD_LINE_ARGS=%$
 
 :execute
 @rem Setup the command line
diff --git a/pom.xml b/pom.xml
index 0a814c1a..8b47cabe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
 	<groupId>org.gitlab</groupId>
 	<artifactId>java-gitlab-api</artifactId>
-	<version>4.0.1.smartbear.8.2</version>
+	<version>4.0.1.smartbear.8.3</version>
 
 	<name>Gitlab Java API Wrapper</name>
 	<description>A Java wrapper for the Gitlab Git Hosting Server API</description>
@@ -64,7 +64,7 @@
 		<maven.compiler.target>1.8</maven.compiler.target>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<maven-surefire-plugin.version>2.20</maven-surefire-plugin.version>
+		<maven-surefire-plugin.version>3.5.4</maven-surefire-plugin.version>
 		<!-- wait three minutes for gitlab to start -->
 		<docker-maven-plugin.timeOut>180000</docker-maven-plugin.timeOut>
 	</properties>
@@ -73,17 +73,17 @@
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-core</artifactId>
-			<version>2.5.3</version>
+			<version>2.15.2</version>
 		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-databind</artifactId>
-			<version>2.5.3</version>
+			<version>2.15.2</version>
 		</dependency>
 		<dependency>
 			<groupId>commons-io</groupId>
 			<artifactId>commons-io</artifactId>
-			<version>2.4</version>
+			<version>2.14.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.hamcrest</groupId>
@@ -94,7 +94,7 @@
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.12</version>
+			<version>4.13.1</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
@@ -104,7 +104,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>2.5.1</version>
+				<version>3.14.1</version>
 			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
diff --git a/src/main/java/org/gitlab/api/models/GitlabPipeline.java b/src/main/java/org/gitlab/api/models/GitlabPipeline.java
index 31927db5..ae538bb5 100644
--- a/src/main/java/org/gitlab/api/models/GitlabPipeline.java
+++ b/src/main/java/org/gitlab/api/models/GitlabPipeline.java
@@ -7,7 +7,7 @@ public class GitlabPipeline {
 
 
     @JsonProperty("id")
-    private Integer id;
+    private Long  id;
 
     @JsonProperty("ref")
     private String ref;
@@ -18,11 +18,11 @@ public class GitlabPipeline {
     @JsonProperty("status")
     private String status;
 
-    public Integer getId() {
+    public Long getId() {
         return id;
     }
 
-    public void setId(Integer id) {
+    public void setId(Long id) {
         this.id = id;
     }