diff --git a/CHANGELOG.md b/CHANGELOG.md
index 940f7263ac77019db8eeb1786174d448e0463e96..7a6a478296fe47096651f48077120f07bd9d4082 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 2.5.5
+This is a maintenance release which only brings libraries up to date to fix
+potential bugs.
+
 ## 2.5.4
 This is a maintenance release which only brings libraries up to date to fix
 potential bugs.
diff --git a/pom.xml b/pom.xml
index 4d45261a1777309c49018ccbaba1f4202361d8ea..83961f71d003f18cd88986dffc464f366adef6ca 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,8 +7,8 @@
 	<packaging>war</packaging>
 
 	<properties>
-		<io.spring.platform-version>Brussels-SR7</io.spring.platform-version>
-		<io.netty-version>4.1.22.Final</io.netty-version>
+		<io.spring.platform-version>Brussels-SR9</io.spring.platform-version>
+		<io.netty-version>4.1.23.Final</io.netty-version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<timestamp>${maven.build.timestamp}</timestamp>
 		<sonar.language>java</sonar.language>
@@ -344,7 +344,7 @@
 			<plugin>
 				<groupId>org.eclipse.jetty</groupId>
 				<artifactId>jetty-maven-plugin</artifactId>
-				<version>9.4.8.v20171121</version>
+				<version>9.4.9.v20180320</version>
 				<configuration>
 					<scanIntervalSeconds>1</scanIntervalSeconds>
 					<webApp>
@@ -384,7 +384,7 @@
 			<plugin>
 				<groupId>org.jacoco</groupId>
 				<artifactId>jacoco-maven-plugin</artifactId>
-				<version>0.8.0</version>
+				<version>0.8.1</version>
 				<executions>
 					<execution>
 						<id>default-prepare-agent</id>
@@ -427,7 +427,7 @@
 			<plugin>
 				<groupId>com.github.kongchen</groupId>
 				<artifactId>swagger-maven-plugin</artifactId>
-				<version>3.1.6</version>
+				<version>3.1.7</version>
 				<configuration>
 					<apiSources>
 						<apiSource>