specifying ranges for pre-reqs
diff --git a/plugins/org.eclipse.wst.server.preview/META-INF/MANIFEST.MF b/plugins/org.eclipse.wst.server.preview/META-INF/MANIFEST.MF
index 00fcc59..9aa19df 100644
--- a/plugins/org.eclipse.wst.server.preview/META-INF/MANIFEST.MF
+++ b/plugins/org.eclipse.wst.server.preview/META-INF/MANIFEST.MF
@@ -8,7 +8,7 @@
 Bundle-Localization: plugin
 Export-Package: org.eclipse.wst.server.preview.internal
 Require-Bundle: org.eclipse.core.runtime;bundle-version="[3.2.0,4.0.0)",
- org.mortbay.jetty,
- org.apache.commons.logging
+ org.mortbay.jetty;bundle-version="[5.1.11,6.0.0)",
+ org.apache.commons.logging;bundle-version="[1.0.4,2.0.0)"
 Eclipse-LazyStart: true
 Bundle-RequiredExecutionEnvironment: J2SE-1.4