diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 88e3c289db71365ab7139a28ca47eed5c35b3993..6fa4bfdddbe3d681519c48cc6d20c9d6e3373672 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,7 +32,7 @@ test:centos6.6:
     - module load numpy/1.9.1-goolf-1.4.10-Python-2.7.5
     - module load Boost/1.53.0-goolf-1.4.10-Python-2.7.5
     - module load OpenMM/6.1-Linux64
-    - module load PyQt/4.11.4-goolf-1.4.10-Python-2.7.5
+    - module load Qt5/5.9.3-goolf-1.7.20
     - module load LibTIFF/4.0.3-goolf-1.4.10
     - module load libpng/1.6.17-goolf-1.4.10
     - module load zlib/1.2.8-goolf-1.4.10
@@ -58,7 +58,7 @@ test:centos6.6:
              -DFFTW_LIBRARY=$EBROOTFFTW/lib/libfftw3f.a
              -DFFTW_INCLUDE_DIR=$EBROOTFFTW/include
              -DBOOST_ROOT=$EBROOTBOOST
-             -DQT_QMAKE_EXECUTABLE=$EBROOTQT/bin/qmake
+             -DQT_QMAKE_EXECUTABLE=$EBROOTQT5/bin/qmake
              -DPNG_LIBRARY=$EBROOTLIBPNG/lib/libpng.so
              -DPNG_INCLUDE_DIR=$EBROOTLIBPNG/include
              -DPNG_PNG_INCLUDE_DIR=$EBROOTLIBPNG/include
@@ -101,7 +101,7 @@ test:centos7.3:
     - module load Eigen/3.2.8-goolf-1.7.20
     - module load numpy/1.10.1-goolf-1.7.20-Python-2.7.11
     - module load Boost/1.53.0-goolf-1.7.20-Python-2.7.11
-    - module load PyQt/4.11.4-goolf-1.7.20-Python-2.7.11
+    - module load Qt5/5.9.3-goolf-1.7.20
     - module load LibTIFF/.4.0.4-goolf-1.7.20
     - module load Perl/5.22.2-goolf-1.7.20
     - module load HH-suite/2.0.16-goolf-1.7.20-Boost-1.53.0-Python-2.7.11
@@ -126,7 +126,7 @@ test:centos7.3:
              -DFFTW_LIBRARY=$EBROOTFFTW/lib/libfftw3f.a
              -DFFTW_INCLUDE_DIR=$EBROOTFFTW/include
              -DBOOST_ROOT=$EBROOTBOOST
-             -DQT_QMAKE_EXECUTABLE=$EBROOTQT/bin/qmake
+             -DQT_QMAKE_EXECUTABLE=$EBROOTQT5/bin/qmake
              -DPNG_LIBRARY=$EBROOTLIBPNG/lib/libpng.so
              -DPNG_INCLUDE_DIR=$EBROOTLIBPNG/include
              -DPNG_PNG_INCLUDE_DIR=$EBROOTLIBPNG/include
@@ -135,8 +135,8 @@ test:centos7.3:
              -DTIFF_INCLUDE_DIR=$EBROOTLIBTIFF/include
              -DTIFF_LIBRARY=$EBROOTLIBTIFF/lib/libtiff.so
              -DOPTIMIZE=1
-             -DCMAKE_C_FLAGS='-L/scicore/soft/apps/LibTIFF/4.0.4-goolf-1.7.20/lib/ -L/scicore/soft/apps/libpng/1.6.18-goolf-1.7.20/lib/ -L/scicore/soft/apps/Boost/1.53.0-goolf-1.7.20-Python-2.7.11/lib/ -L/scicore/soft/apps/Qt/4.8.6-goolf-1.7.20/lib/ -Wno-unused-local-typedefs'
-             -DCMAKE_CXX_FLAGS='-L/scicore/soft/apps/LibTIFF/4.0.4-goolf-1.7.20/lib/ -L/scicore/soft/apps/libpng/1.6.18-goolf-1.7.20/lib/ -L/scicore/soft/apps/Boost/1.53.0-goolf-1.7.20-Python-2.7.11/lib/ -L/scicore/soft/apps/Qt/4.8.6-goolf-1.7.20/lib/ -Wno-unused-local-typedefs'
+             -DCMAKE_C_FLAGS='-L/scicore/soft/apps/LibTIFF/4.0.4-goolf-1.7.20/lib/ -L/scicore/soft/apps/libpng/1.6.18-goolf-1.7.20/lib/ -L/scicore/soft/apps/Boost/1.53.0-goolf-1.7.20-Python-2.7.11/lib/ -L/scicore/soft/apps/Qt5/5.9.3-goolf-1.7.20/lib/ -Wno-unused-local-typedefs'
+             -DCMAKE_CXX_FLAGS='-L/scicore/soft/apps/LibTIFF/4.0.4-goolf-1.7.20/lib/ -L/scicore/soft/apps/libpng/1.6.18-goolf-1.7.20/lib/ -L/scicore/soft/apps/Boost/1.53.0-goolf-1.7.20-Python-2.7.11/lib/ -L/scicore/soft/apps/Qt5/5.9.3-goolf-1.7.20/lib/ -Wno-unused-local-typedefs'
   - make -j 2
   - echo "    ... done building OST."
   - echo "    Running unit tests for OST..."