diff --git a/environment.yml b/environment.yml
new file mode 100644
index 00000000..0dbd901f
--- /dev/null
+++ b/environment.yml
@@ -0,0 +1,7 @@
+name: _rtree
+channels:
+- defaults
+- conda-forge
+dependencies:
+- python>=3.5
+- libspatialindex
diff --git a/readthedocs.yml b/readthedocs.yml
new file mode 100644
index 00000000..df1e840d
--- /dev/null
+++ b/readthedocs.yml
@@ -0,0 +1,5 @@
+python:
+  version: 3
+  pip_install: true
+conda:
+  file: environment.yml