diff --git a/docs/environment.yml b/docs/environment.yml
index 1df86c7..b72cdaf 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -1,15 +1,13 @@
 name: test
 channels:
-    - omnia
-    - defaults
     - conda-forge
 dependencies:
-    - python
-    - mdtraj
-    - numpy
-    - scipy
-    - pandas
-    - packaging
+    - python=3.7
+    - mdtraj=1.9.2
+    - numpy=1.16.2
+    - scipy=1.2.1
+    - pandas=0.24.2
+    - packaging=19.0
     - nbsphinx
     - pandoc
     - jupyter
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 0000000..bbf2620
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,4 @@
+packaging
+nbsphinx
+pandoc
+jupyter
diff --git a/docs/rtd_requirements.txt b/docs/rtd_requirements.txt
new file mode 100644
index 0000000..7933e57
--- /dev/null
+++ b/docs/rtd_requirements.txt
@@ -0,0 +1,2 @@
+cython
+numpy
diff --git a/readthedocs.yml b/readthedocs.yml
index 5e89905..dfbea26 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -1,5 +1,16 @@
+version: 2
+
 conda:
-    file: docs/environment.yml
+    environment: docs/environment.yml
 
 python:
-    setup_py_install: true
+    install:
+      #- requirements: docs/rtd_requirements.txt
+      #- requirements: requirements.txt
+      #- requirements: docs/requirements.txt
+      - method: setuptools
+        path: .
+      #- method: pip
+        #path: .
+    #system_packages: false
+