diff --git a/readthedocs_requirements.txt b/readthedocs_requirements.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9518256c326d1caf0dc19f9e92222458e411672d
--- /dev/null
+++ b/readthedocs_requirements.txt
@@ -0,0 +1 @@
+nbsphinx