diff --git a/pom.xml b/pom.xml
index c47d96199..3d8431dff 100644
--- a/pom.xml
+++ b/pom.xml
@@ -126,8 +126,9 @@ Copyright (c) 2012 - Jeremy Long
         <!-- new versions of lucene are compiled with JDK 1.7 and cannot be used ubiquitously in Jenkins
         thus, we cannot upgrade beyond 4.7.2 -->
         <apache.lucene.version>4.7.2</apache.lucene.version>
-        <slf4j.version>1.7.21</slf4j.version>
-        <logback.version>1.1.7</logback.version>
+        <apache.ant.version>1.9.8</apache.ant.version>
+        <slf4j.version>1.7.22</slf4j.version>
+        <logback.version>1.1.8</logback.version>
         <!-- Note that Maven will use classes from the distro, ignoring declared dependencies for Maven core... -->
         <maven.api.version>3.3.9</maven.api.version>
         <reporting.checkstyle-plugin.version>2.17</reporting.checkstyle-plugin.version>
@@ -377,6 +378,26 @@ Copyright (c) 2012 - Jeremy Long
             </activation>
             <build>
                 <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-enforcer-plugin</artifactId>
+                        <version>1.4.1</version>
+                        <executions>
+                            <execution>
+                                <id>enforce-java</id>
+                                <goals>
+                                    <goal>enforce</goal>
+                                </goals>
+                                <configuration>
+                                    <rules>
+                                        <requireJavaVersion>
+                                            <version>1.6.0</version>
+                                        </requireJavaVersion>
+                                    </rules>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>
@@ -547,7 +568,7 @@ Copyright (c) 2012 - Jeremy Long
             <dependency>
                 <groupId>joda-time</groupId>
                 <artifactId>joda-time</artifactId>
-                <version>2.9.6</version>
+                <version>2.9.7</version>
             </dependency>
             <dependency>
                 <groupId>com.google.code.findbugs</groupId>
@@ -599,17 +620,17 @@ Copyright (c) 2012 - Jeremy Long
             <dependency>
                 <groupId>org.apache.commons</groupId>
                 <artifactId>commons-compress</artifactId>
-                <version>1.12</version>
+                <version>1.13</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.ant</groupId>
                 <artifactId>ant</artifactId>
-                <version>1.9.7</version>
+                <version>${apache.ant.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.ant</groupId>
                 <artifactId>ant-testutil</artifactId>
-                <version>1.9.7</version>
+                <version>${apache.ant.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.lucene</groupId>
@@ -696,13 +717,13 @@ Copyright (c) 2012 - Jeremy Long
             <dependency>
                 <groupId>org.jmockit</groupId>
                 <artifactId>jmockit</artifactId>
-                <version>1.24</version>
+                <version>1.25</version>
                 <scope>test</scope>
             </dependency>
             <dependency>
                 <groupId>org.jsoup</groupId>
                 <artifactId>jsoup</artifactId>
-                <version>1.9.2</version>
+                <version>1.10.1</version>
             </dependency>
             <dependency>
                 <groupId>org.slf4j</groupId>