multiple checker configs
diff --git a/core/plugins/org.eclipse.dltk.validators.core/META-INF/MANIFEST.MF b/core/plugins/org.eclipse.dltk.validators.core/META-INF/MANIFEST.MF
index 448f00c..9eb76e1 100644
--- a/core/plugins/org.eclipse.dltk.validators.core/META-INF/MANIFEST.MF
+++ b/core/plugins/org.eclipse.dltk.validators.core/META-INF/MANIFEST.MF
@@ -15,5 +15,5 @@
  org.eclipse.dltk.validators.internal.core
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
-Bundle-RequiredExecutionEnvironment: J2SE-1.4
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Bundle-ActivationPolicy: lazy