diff --git a/acme4j-client/src/site/site.xml b/acme4j-client/src/site/site.xml
index cee3e214..1c13681e 100644
--- a/acme4j-client/src/site/site.xml
+++ b/acme4j-client/src/site/site.xml
@@ -38,6 +38,6 @@
   <skin>
     <groupId>org.apache.maven.skins</groupId>
     <artifactId>maven-fluido-skin</artifactId>
-    <version>1.4</version>
+    <version>1.6</version>
   </skin>
 </project>
diff --git a/acme4j-example/pom.xml b/acme4j-example/pom.xml
index e48871d4..b418b68c 100644
--- a/acme4j-example/pom.xml
+++ b/acme4j-example/pom.xml
@@ -33,7 +33,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>
-                <version>1.4.0</version>
+                <version>1.5.0</version>
                 <executions>
                     <execution>
                         <goals>
diff --git a/acme4j-example/src/site/site.xml b/acme4j-example/src/site/site.xml
index 47d38758..3a6415c7 100644
--- a/acme4j-example/src/site/site.xml
+++ b/acme4j-example/src/site/site.xml
@@ -37,6 +37,6 @@
   <skin>
     <groupId>org.apache.maven.skins</groupId>
     <artifactId>maven-fluido-skin</artifactId>
-    <version>1.4</version>
+    <version>1.6</version>
   </skin>
 </project>
diff --git a/acme4j-utils/src/site/site.xml b/acme4j-utils/src/site/site.xml
index e41e3359..c3416c78 100644
--- a/acme4j-utils/src/site/site.xml
+++ b/acme4j-utils/src/site/site.xml
@@ -38,6 +38,6 @@
   <skin>
     <groupId>org.apache.maven.skins</groupId>
     <artifactId>maven-fluido-skin</artifactId>
-    <version>1.4</version>
+    <version>1.6</version>
   </skin>
 </project>
diff --git a/pom.xml b/pom.xml
index 4e55dde3..6758aae7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,7 +52,7 @@
 
     <properties>
         <bouncycastle.version>1.55</bouncycastle.version>
-        <jose4j.version>0.5.2</jose4j.version>
+        <jose4j.version>0.5.3</jose4j.version>
         <slf4j.version>1.7.21</slf4j.version>
         <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
     </properties>
@@ -68,7 +68,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
+                <version>3.6.0</version>
                 <configuration>
                     <source>1.7</source>
                     <target>1.7</target>
@@ -77,7 +77,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.19</version>
+                <version>2.19.1</version>
                 <configuration>
                     <parallel>classes</parallel>
                     <threadCount>10</threadCount>
@@ -87,7 +87,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>2.4</version>
+                <version>3.0.2</version>
                 <configuration>
                     <excludes>
                         <exclude>**/.gitignore</exclude>
@@ -97,7 +97,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.4</version>
+                <version>3.6</version>
                 <configuration>
                     <outputEncoding>UTF-8</outputEncoding>
                 </configuration>
@@ -105,14 +105,14 @@
                     <dependency>
                         <groupId>org.apache.maven.doxia</groupId>
                         <artifactId>doxia-module-markdown</artifactId>
-                        <version>1.6</version>
+                        <version>1.7</version>
                     </dependency>
                 </dependencies>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-release-plugin</artifactId>
-                <version>2.5</version>
+                <version>2.5.3</version>
                 <configuration>
                     <autoVersionSubmodules>true</autoVersionSubmodules>
                     <tagNameFormat>v@{project.version}</tagNameFormat>
@@ -127,7 +127,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.7</version>
+                <version>2.9</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -144,12 +144,12 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-report-plugin</artifactId>
-                <version>2.19</version>
+                <version>2.19.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.9.1</version>
+                <version>2.10.4</version>
                 <configuration>
                     <links>
                         <link>http://docs.oracle.com/javase/7/docs/api/</link>
diff --git a/src/site/site.xml b/src/site/site.xml
index d771aa89..0c98a1f7 100644
--- a/src/site/site.xml
+++ b/src/site/site.xml
@@ -55,6 +55,6 @@
   <skin>
     <groupId>org.apache.maven.skins</groupId>
     <artifactId>maven-fluido-skin</artifactId>
-    <version>1.4</version>
+    <version>1.6</version>
   </skin>
 </project>