diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0c41410..f0769b2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,9 +9,15 @@ set(CPACK_PACKAGE_NAME "OpenBR")
 set(CPACK_PACKAGE_VENDOR "OpenBiometrics")
 set(CPACK_PACKAGE_DESCRIPTION "Open Source Biometric Recognition")
 set(CPACK_PACKAGE_INSTALL_DIRECTORY ${CPACK_PACKAGE_NAME})
-set(CPACK_PACKAGE_VERSION_MAJOR 0)
-set(CPACK_PACKAGE_VERSION_MINOR 6)
-set(CPACK_PACKAGE_VERSION_PATCH 0)
+if(NOT DEFINED CPACK_PACKAGE_VERSION_MAJOR)
+  set(CPACK_PACKAGE_VERSION_MAJOR 0)
+endif()
+if(NOT DEFINED CPACK_PACKAGE_VERSION_MINOR)
+  set(CPACK_PACKAGE_VERSION_MINOR 6)
+endif()
+if(NOT DEFINED CPACK_PACKAGE_VERSION_PATCH)
+  set(CPACK_PACKAGE_VERSION_PATCH 0)
+endif()
 set(CPACK_PACKAGE_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}")
 set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE.txt")
 set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")