diff --git a/.readthedocs.yml b/.readthedocs.yml
index bdd185b..b796095 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -8,6 +8,9 @@ sphinx:
   fail_on_warning: true
 
 python:
-   version: 3.7
-   install:
-      - requirements: rtd.txt
+  version: 3.7
+  install:
+  - method: pip
+    path: .
+    extra_requirements:
+      - docs
diff --git a/documentation/source/conf.py b/documentation/source/conf.py
index b468f64..362ac8f 100644
--- a/documentation/source/conf.py
+++ b/documentation/source/conf.py
@@ -6,4 +6,3 @@ master_doc = 'index'
 project = 'hypercore-crypto'
 templates_path = ['_templates']
 extensions = ['sphinx.ext.autodoc', 'sphinx_autodoc_typehints']
-autodoc_mock_imports = ['pysodium']  # no libsodium in the RTD environment
diff --git a/rtd.txt b/rtd.txt
deleted file mode 100644
index 9870699..0000000
--- a/rtd.txt
+++ /dev/null
@@ -1 +0,0 @@
-sphinx-autodoc-typehints >= 1.6.0, < 2.0