diff --git a/redhat/opm-simulators.spec b/redhat/opm-simulators.spec
index 3581b1ac7..363913d00 100644
--- a/redhat/opm-simulators.spec
+++ b/redhat/opm-simulators.spec
@@ -2,10 +2,10 @@
 # spec file for package opm-autodiff
 #
 
-%define tag rc4
+%define tag rc1
 
 Name:           opm-simulators
-Version:        2015.10
+Version:        2017.10
 Release:        0
 Summary:        Open Porous Media - core library
 License:        GPL-3.0
@@ -13,11 +13,11 @@ Group:          Development/Libraries/C and C++
 Url:            http://www.opm-project.org/
 Source0:        https://github.com/OPM/%{name}/archive/release/%{version}/%{tag}.tar.gz#/%{name}-%{version}.tar.gz
 BuildRequires:  blas-devel lapack-devel dune-common-devel opm-output-devel
-BuildRequires:  git suitesparse-devel doxygen bc
+BuildRequires:  git suitesparse-devel doxygen bc devtoolset-6-toolchain 
 BuildRequires:  opm-parser-devel opm-core-devel opm-grid-devel
-BuildRequires:  tinyxml-devel dune-istl-devel eigen3-devel ert.ecl-devel ewoms-devel
-%{?el6:BuildRequires: cmake28 devtoolset-3-toolchain boost148-devel}
-%{!?el6:BuildRequires: cmake gcc gcc-c++ boost-devel}
+BuildRequires:  tinyxml-devel dune-istl-devel eigen3-devel ecl-devel ewoms-devel
+%{?el6:BuildRequires: cmake3 boost148-devel}
+%{!?el6:BuildRequires: cmake boost-devel}
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Requires:       libopm-simulators1 = %{version}
 
@@ -59,8 +59,8 @@ This package contains the applications for opm-simulators
 %setup -q -n %{name}-release-%{version}-%{tag}
 
 %build
-%{?el6:scl enable devtoolset-3 bash}
-%{?el6:cmake28} %{?!el6:cmake} -DBUILD_SHARED_LIBS=1 -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%{_prefix} -DCMAKE_INSTALL_DOCDIR=share/doc/%{name}-%{version} -DUSE_RUNPATH=OFF -DWITH_NATIVE=OFF %{?el6:-DCMAKE_CXX_COMPILER=/opt/rh/devtoolset-3/root/usr/bin/g++ -DCMAKE_C_COMPILER=/opt/rh/devtoolset-3/root/usr/bin/gcc -DBOOST_LIBRARYDIR=%{_libdir}/boost148 -DBOOST_INCLUDEDIR=%{_includedir}/boost148}
+scl enable devtoolset-6 bash
+%{?el6:cmake3} %{?!el6:cmake} -DBUILD_SHARED_LIBS=1 -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%{_prefix} -DCMAKE_INSTALL_DOCDIR=share/doc/%{name}-%{version} -DUSE_RUNPATH=OFF -DWITH_NATIVE=OFF -DCMAKE_CXX_COMPILER=/opt/rh/devtoolset-6/root/usr/bin/g++ -DCMAKE_C_COMPILER=/opt/rh/devtoolset-6/root/usr/bin/gcc %{?el6:-DBOOST_LIBRARYDIR=%{_libdir}/boost148 -DBOOST_INCLUDEDIR=%{_includedir}/boost148}
 make
 
 %install