diff --git a/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py b/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py
index 3b89a0fc18b76..6e782c8fd75ba 100644
--- a/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py
+++ b/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py
@@ -38,7 +38,9 @@
     nEvents = cms.untracked.uint32(5000),
     numberOfParameters = cms.uint32(1),
     outputFile = cms.string('cmsgrid_final.lhe'),
-    scriptName = cms.FileInPath('GeneratorInterface/LHEInterface/data/run_generic_tarball_cvmfs.sh')
+    scriptName = cms.FileInPath('GeneratorInterface/LHEInterface/data/run_generic_tarball_cvmfs.sh'),
+    generateConcurrently = cms.untracked.bool(True),
+    postGenerationCommand = cms.untracked.vstring('mergeLHE.py', '-i', 'thread*/cmsgrid_final.lhe', '-o', 'cmsgrid_final.lhe')
 )