diff --git a/.readthedocs.yml b/.readthedocs.yml
index a4b6f431..594a11b4 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,6 +1,7 @@
 ---
+version: 2
 python:
-  version: 3
+  version: 3.7
   pip_install: true
   extra_requirements:
     - docs
diff --git a/.travis.yml b/.travis.yml
index cd4a62f5..903ee411 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,7 +44,7 @@ matrix:
       env: TOXENV=py37
 
     # Docs
-    - python: "3.5"
+    - python: "3.7"
       stage: docs
       env: TOXENV=docs
     - python: "3.7"
diff --git a/tox.ini b/tox.ini
index 5d94364e..2e801c6b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -45,8 +45,8 @@ commands = pre-commit run --all-files
 
 
 [testenv:docs]
-# RTD only allows for 3.5
-basepython = python3.5
+# RTD only allows for 3.7
+basepython = python3.7
 extras = docs
 commands = sphinx-build -W -b html -d {envtmpdir}/doctrees docs docs/_build/html