diff --git a/COPASI.spec b/COPASI.spec
index 58cb03d..7d9f91c 100644
--- a/COPASI.spec
+++ b/COPASI.spec
@@ -35,12 +35,6 @@ Obsoletes: octave-%{octpkg} < 0:4.23.184-2
 ##Use QWT6? (Experimental)
 %global with_qwt6    0
 
-# Use Qt4
-%global with_qt4     0
-
-# Use Qt5
-%global with_qt5     1
-
 %if 0%{?with_octave}
 # Exclude .oct files from provides
 %global __provides_exclude_from ^%{octpkglibdir}/.*\\.oct$
@@ -62,7 +56,7 @@ Obsoletes: octave-%{octpkg} < 0:4.23.184-2
 Name:  COPASI
 Summary: Biochemical network simulator
 Version: 4.23.%{buildid}
-Release: 6%{?dist}
+Release: 7%{?dist}
 
 ##Artistic 2.0 is main license
 ##GPLv2+ is related to a Mixed Source Licensing Scenario
@@ -80,20 +74,11 @@ Source1: %{name}.appdata.xml
 %if 0%{?with_qwt6}
 BuildRequires:  qwt-devel
 %endif
-%if 0%{?with_qt4}
-BuildRequires:  qwt5-qt4-devel
-BuildRequires:  qwtplot3d-qt4-devel
-BuildRequires:  qt-devel
-BuildRequires:  qt-webkit-devel
-BuildRequires:  libmml-qt4-devel
-%endif
-%if 0%{?with_qt5}
 BuildRequires:  qwt-qt5-devel
 BuildRequires:  qwtplot3d-qt5-devel >= 0.3.1a-4
 BuildRequires:  qt5-qtbase-devel
 BuildRequires:  qt5-qtwebkit-devel
 BuildRequires:  libmml-qt5-devel
-%endif
 BuildRequires: freeglut-devel
 BuildRequires: libsbml-devel
 BuildRequires: libsedml-devel >= 1:0.4.3-3
@@ -292,17 +277,6 @@ done
 ##Set Qwt libdir
 sed -e 's|@@libdir@@|%{_libdir}|g' -i CMakeModules/FindQwtQt4.cmake
 
-%if 0%{?with_qt4}
-%patch2 -p0
-####Set QTPLOT3D-QT4 paths
-sed -e 's|@@qtplot3d_includedir@@|%{_includedir}|g' -i CMakeModules/FindQwtplot3dQt4.cmake
-sed -e 's|@@qtplot3d_libdir@@|%{_libdir}|g' -i CMakeModules/FindQwtplot3dQt4.cmake
-
-##Set QtMmlQt4 paths
-sed -e 's|@@_libmml_includedir@@|%{_qt4_headerdir}/libmml-qt4|g' -i CMakeModules/FindQtMmlQt4.cmake
-sed -e 's|@@_libmml_libdir@@|%{_qt4_libdir}|g' -i CMakeModules/FindQtMmlQt4.cmake
-%endif
-%if 0%{?with_qt5}
 %patch5 -p0
 ####Set QTPLOT3D-QT5 paths
 sed -e 's|@@qtplot3d_includedir@@|%{_qt5_headerdir}/qwtplot3d-qt5|g' -i CMakeModules/FindQwtplot3dQt4.cmake
@@ -311,7 +285,6 @@ sed -e 's|@@qtplot3d_libdir@@|%{_qt5_libdir}|g' -i CMakeModules/FindQwtplot3dQt4
 ##Set QtMmlQt5 paths
 sed -e 's|@@_libmml_includedir@@|%{_qt5_headerdir}/libmml-qt5|g' -i CMakeModules/FindQtMmlQt4.cmake
 sed -e 's|@@_libmml_libdir@@|%{_qt5_libdir}|g' -i CMakeModules/FindQtMmlQt4.cmake
-%endif
 
 %build
 mkdir -p build && pushd build
@@ -360,29 +333,15 @@ export INCBLAS=%{_includedir}
 %if 0%{?with_qwt6}
  -DQWT_VERSION_STRING:STRING=6.1.3 \
 %endif
-%if 0%{?with_qt4}
- -DSELECT_QT=Qt4 \
- -DQT_QMAKE_EXECUTABLE:FILEPATH=%{_bindir}/qmake-qt4 \
- -DQWT_VERSION_STRING:STRING=5.2.2 \
- -DQWT_LIBRARY:FILEPATH=%{_qt4_libdir}/libqwt5-qt4.so \
- -DQWT_INCLUDE_DIR:PATH=%{_qt4_headerdir}/qwt5-qt4 \
-%endif
-%if 0%{?with_qt5}
  -DSELECT_QT=Qt5 \
  -DQT_QMAKE_EXECUTABLE:FILEPATH=%{_bindir}/qmake-qt5 \
  -DQWT_VERSION_STRING:STRING=6.1.3 \
  -DQWT_LIBRARY:FILEPATH=%{_qt5_libdir}/libqwt-qt5.so \
  -DQWT_INCLUDE_DIR:PATH=%{_qt5_headerdir}/qwt \
-%endif
  -DBUILD_GUI:BOOL=ON -DBUILD_COPASISBW:BOOL=ON --DENABLE_MML:BOOL=ON -DENABLE_USE_SBMLUNIT=ON \
  -DCMAKE_SHARED_LINKER_FLAGS_RELEASE:STRING="%{__global_ldflags} -Wl,-z,relro -fPIC -pie -Wl,-z,now -pthread" \
  -DCMAKE_EXE_LINKER_FLAGS:STRING="%{__global_ldflags} -Wl,-z,relro -fPIC -pie -Wl,-z,now" \
-%if 0%{?with_qt5}
  -DMML_INCLUDE_DIR:PATH=%{_qt5_headerdir}/libmml-qt5 -DMML_LIBRARY:FILEPATH=%{_qt5_libdir}/libmml.so \
-%endif
-%if 0%{?with_qt4}
- -DMML_INCLUDE_DIR:PATH=%{_qt4_headerdir}/libmml-qt4 -DMML_LIBRARY:FILEPATH=%{_qt4_libdir}/libmml-qt4.so \
-%endif
  -DENABLE_SBW_INTEGRATION=ON -DBUILD_CXX_EXAMPLES=ON \
  -DENABLE_COPASI_BANDED_GRAPH:BOOL=ON -DENABLE_COPASI_SEDML:BOOL=ON \
  -DENABLE_COPASI_NONLIN_DYN_OSCILLATION:BOOL=ON -DENABLE_COPASI_EXTUNIT:BOOL=ON \
@@ -613,6 +572,9 @@ appstream-util validate-relax --nonet $RPM_BUILD_ROOT%{_datadir}/metainfo/*.appd
 %{_datadir}/copasi/doc/
 
 %changelog
+* Thu May 31 2018 Antonio Trande <sagitterATfedoraproject.org> - 4.23.184-7
+- Use always Qt5
+
 * Fri May 18 2018 Antonio Trande <sagitterATfedoraproject.org> - 4.23.184-6
 - Fix Python interpreter