Updated

Author: rijnb

pom.xml

@@ -76,7 +76,7 @@
         <maven-javadoc-plugin.version>2.10.3</maven-javadoc-plugin.version>
         <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
         <maven-source-plugin.version>3.0.0</maven-source-plugin.version>
-        <maven-surefire-plugin.version>9</maven-surefire-plugin.version>
+        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
 
         <!-- libraries. -->
         <gson.version>2.6.2</gson.version>
@@ -163,7 +163,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.1${maven-surefire-plugin.version}.1</version>
+                <version>${maven-surefire-plugin.version}</version>
                 <configuration>
                     <forkCount>1</forkCount>
                     <reuseForks>true</reuseForks>