diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f6a25c9aecd6d8a324f41ead6930611cf81610ac..6dd7f89672a3e1216c5be30eefc63d6192bcf9fa 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,7 @@ slc6-gcc48:
     - mkdir build 
     - cd build
     - cmake -D DD4HEP_USE_GEANT4=ON -D DD4HEP_USE_BOOST=ON -DBoost_NO_BOOST_CMAKE=ON -D DD4HEP_USE_LCIO=ON -D BUILD_TESTING=ON -DCLHEP_DIR=$CLHEP -D Geant4_DIR=$G4INSTALL/lib64/Geant4-10.2.0 -D DD4HEP_USE_CXX11=ON ..        
-    - make -j2
+    - make -j4
     - make install
     - make test    
     
@@ -20,7 +20,7 @@ slc6-gcc49:
     - mkdir build 
     - cd build
     - cmake -D DD4HEP_USE_GEANT4=ON -D DD4HEP_USE_BOOST=ON -DBoost_NO_BOOST_CMAKE=ON -D DD4HEP_USE_LCIO=ON -D BUILD_TESTING=ON -DCLHEP_DIR=$CLHEP -D Geant4_DIR=$G4INSTALL/lib64/Geant4-10.2.0 -D DD4HEP_USE_CXX14=ON ..        
-    - make -j2
+    - make -j4
     - make install
     - make test
 
@@ -33,6 +33,6 @@ centos7-gcc49:
     - mkdir build 
     - cd build
     - cmake -D DD4HEP_USE_GEANT4=ON -D DD4HEP_USE_BOOST=ON -DBoost_NO_BOOST_CMAKE=ON -D DD4HEP_USE_LCIO=ON -D BUILD_TESTING=ON -DCLHEP_DIR=$CLHEP -D Geant4_DIR=$G4INSTALL/lib64/Geant4-10.2.0 -D DD4HEP_USE_CXX14=ON ..        
-    - make -j2
+    - make -j4
     - make install
-    - make test
\ No newline at end of file
+    - make test