diff --git a/org.ntlab.refactoring.decouplingClasses/META-INF/MANIFEST.MF b/org.ntlab.refactoring.decouplingClasses/META-INF/MANIFEST.MF
index ea34033..5362c18 100644
--- a/org.ntlab.refactoring.decouplingClasses/META-INF/MANIFEST.MF
+++ b/org.ntlab.refactoring.decouplingClasses/META-INF/MANIFEST.MF
@@ -12,7 +12,8 @@
  org.eclipse.ui.workbench,
  org.eclipse.jdt.ui,
  org.eclipse.ltk.core.refactoring,
- org.eclipse.jdt.core.manipulation
+ org.eclipse.jdt.core.manipulation,
+ org.eclipse.core.filebuffers;bundle-version="3.6.400"
 Bundle-RequiredExecutionEnvironment: JavaSE-1.7
 Bundle-ActivationPolicy: lazy
 Import-Package: org.eclipse.core.filesystem,