diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8172b7f0302d6794c9ab510d6d3f487d4e0fc26..dec2c1b9ab2c3466d809c1c40a86331943ad7bdd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,8 +26,8 @@ add_subdirectory("cmake/modules")
 add_subdirectory("cmake/scripts")
 
 # if Python bindings are enabled, include necessary sub directories.
-if( DUNE_ENABLE_PYTHONBINDINGS )
-  add_subdirectory("python")
+if(DUNE_ENABLE_PYTHONBINDINGS)
+  add_subdirectory(python)
   dune_python_install_package(PATH "python")
 endif()
 
diff --git a/dune/CMakeLists.txt b/dune/CMakeLists.txt
index 2a0c96a2dca2e7d2c1bbe5e79689fa4d860eca53..c1a0f14125fde046f3201b188762e75ce3dbbbc8 100644
--- a/dune/CMakeLists.txt
+++ b/dune/CMakeLists.txt
@@ -1,6 +1,6 @@
 add_subdirectory("common")
 
 # if Python bindings are enabled, include necessary sub directories.
-if( DUNE_ENABLE_PYTHONBINDINGS )
-  add_subdirectory("python")
+if(DUNE_ENABLE_PYTHONBINDINGS)
+  add_subdirectory(python)
 endif()
diff --git a/dune/common/parallel/CMakeLists.txt b/dune/common/parallel/CMakeLists.txt
index 6ca379e2ba3e115b2689c6e4c5fbb686bcfe9381..1244770ac7841276022ec273385c14637a6977e3 100644
--- a/dune/common/parallel/CMakeLists.txt
+++ b/dune/common/parallel/CMakeLists.txt
@@ -24,4 +24,3 @@ install(FILES
         selection.hh
         variablesizecommunicator.hh
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/dune/common/parallel)
-
diff --git a/python/dune/common/project.py b/python/dune/common/project.py
index 67ea186d9a4d91fcefaba3cb8fde063dbf200136..1d5cd8868edb54084e3d2a07361bbb1e08e80026 100644
--- a/python/dune/common/project.py
+++ b/python/dune/common/project.py
@@ -65,7 +65,7 @@ def make_project(dir, description, subdirs=None, enable_all_packages=True, is_du
     with open(os.path.join(dir, 'dune.module'), 'w') as file:
         file.write(repr(description))
 
-    cmake_content = ['cmake_minimum_required(VERSION 3.1)', 'project(' + description.name + ' C CXX)']
+    cmake_content = ['cmake_minimum_required(VERSION 3.13)', 'project(' + description.name + ' C CXX)']
     if is_dunepy:
         cmake_content += ['', 'set(DUNE_ENABLE_PYTHONBINDINGS ON)']
     cmake_content += ['',