maven-gpg-plugin 1.4 -> 1.6.
diff --git a/pom.xml b/pom.xml
index 07aaad1..f376be9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,7 +58,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-gpg-plugin</artifactId>
-            <version>1.4</version>
+            <version>1.6</version>
             <executions>
               <execution>
                 <id>sign-artifacts</id>