diff --git a/cmake/modules/DunePythonInstallPackage.cmake b/cmake/modules/DunePythonInstallPackage.cmake
index 91c64cdcbdd52310892bb8b491ab1ff3c7c14e49..f001cd5ffbd4c5ca67e1136ef0a5ec08fbf2b377 100644
--- a/cmake/modules/DunePythonInstallPackage.cmake
+++ b/cmake/modules/DunePythonInstallPackage.cmake
@@ -79,7 +79,7 @@ function(dune_python_install_package)
   endif()
 
   set(INSTALL_CMDLINE -m pip install
-                      "${INSTALL_OPTION}" "${WHEEL_OPTION}" "${EDIT_OPTION}" ${PYINST_ADDITIONAL_PIP_PARAMS}
+                      "${INSTALL_OPTION}" --upgrade "${WHEEL_OPTION}" "${EDIT_OPTION}" ${PYINST_ADDITIONAL_PIP_PARAMS}
                       "${PYINST_FULLPATH}")