diff --git a/pom.xml b/pom.xml
index 2da0043..c4d6d2c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -87,19 +87,16 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>2.5.1</version>
+                <version>3.8.1</version>
                 <configuration>
-                    <source>1.6</source>
-                    <target>1.6</target>
+                    <source>1.7</source>
+                    <target>1.7</target>
                 </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <configuration>
-                	<skip>true</skip>
-                </configuration>
-                <version>1.6</version>
+                <version>1.5</version>
                 <executions>
                     <execution>
                         <id>sign-artifacts</id>
@@ -113,7 +110,7 @@
             <plugin>
                 <groupId>org.sonatype.plugins</groupId>
                 <artifactId>nexus-staging-maven-plugin</artifactId>
-                <version>1.6.3</version>
+                <version>1.6.7</version>
                 <extensions>true</extensions>
                 <configuration>
                     <serverId>ossrh</serverId>
@@ -124,12 +121,12 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
-                <version>2.1.1</version>
+                <version>2.2.1</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
                         <goals>
-                            <goal>jar</goal>
+                            <goal>jar-no-fork</goal>
                         </goals>
                     </execution>
                 </executions>
@@ -137,7 +134,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.10.4</version>
+                <version>2.9.1</version>
                 <executions>
                     <execution>
                         <id>attach-javadocs</id>
@@ -146,9 +143,6 @@
                         </goals>
                     </execution>
                 </executions>
-                <configuration>
-                    <additionalparam>-Xdoclint:none</additionalparam>
-                </configuration>
             </plugin>
         </plugins>
     </build>