Upgrade cmake version.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3965851..1343a18 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
-cmake_minimum_required (VERSION 2.8.6)
+cmake_minimum_required (VERSION 3.0)
 project (QUICKSTEP)
 
 set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")