diff -r 3689a0a9b9d5 -r a45f26cf9e23 readthedoc.yml
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/readthedoc.yml	Thu Dec 20 15:34:22 2018 +0100
@@ -0,0 +1,8 @@
+# .readthedocs.yml
+
+build:
+  image: latest
+
+python:
+  version: 3.5
+  setup_py_install: false