diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 000000000..9d1272de7
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,3 @@
+sphinx==4.2.0
+sphinx_rtd_theme==1.0.0
+readthedocs-sphinx-search==0.1.1