diff --git a/pom.xml b/pom.xml
index 4e26a3c..a093016 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,7 +50,7 @@
             <dependency> 
                 <groupId>junit</groupId>
                 <artifactId>junit</artifactId>
-                <version>4.12</version>
+                <version>4.13.2</version>
                 <scope>test</scope>
             </dependency>
         </dependencies>
@@ -61,7 +61,7 @@
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>animal-sniffer-maven-plugin</artifactId>
-                    <version>1.17</version>
+                    <version>1.21</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-changes-plugin</artifactId>
@@ -78,13 +78,13 @@
                         <dependency>
                             <groupId>org.apache.maven.shared</groupId>
                             <artifactId>maven-shared-resources</artifactId>
-                            <version>2</version>
+                            <version>4</version>
                         </dependency>
                     </dependencies>
                 </plugin>
                 <plugin>
                     <artifactId>maven-jxr-plugin</artifactId>
-                    <version>3.0.0</version>
+                    <version>3.2.0</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-pmd-plugin</artifactId>