update signing plugin version
diff --git a/pom.xml b/pom.xml
index c8c5f12..ce45a60 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
     <jetty-version>8.0.2-SNAPSHOT</jetty-version>
     <p2-install-folder-name>development</p2-install-folder-name>
 
-    <signing-plugin-version>1.0.4</signing-plugin-version>
+    <signing-plugin-version>1.0.5</signing-plugin-version>
 
     <eclipse-mirror-url>http://download.eclipse.org</eclipse-mirror-url>
     <equinox-site>${eclipse-mirror-url}/eclipse/updates/3.8milestones</equinox-site>