diff --git a/sigil/common/core/sigil.properties b/sigil/common/core/sigil.properties
index 5744ec1..47725e1 100644
--- a/sigil/common/core/sigil.properties
+++ b/sigil/common/core/sigil.properties
@@ -1,7 +1,7 @@
 
 # sigil project file, saved by plugin.
 
-version: 0.0.0
+-activator: org.apache.felix.sigil.core.BldCore
 
 -bundles: \
 	org.apache.felix.sigil.common.core, \
@@ -44,7 +44,9 @@
 	org.apache.felix.sigil.model.eclipse, \
 	org.apache.felix.sigil.model.osgi, \
 	org.apache.felix.sigil.repository, \
-	org.eclipse.core.runtime;version=3.4.0, \
-	org.osgi.framework;version=1.4.0, \
+	org.eclipse.core.runtime, \
+	org.osgi.framework, \
+	
+header;Bundle-ActivationPolicy: lazy
 
 # end