diff --git a/.readthedocs.yml b/.readthedocs.yml
index 2c7b9839..0fbb9dba 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,7 +1,7 @@
 version: 2
 
 python:
-  version: 2.7
+  version: 3.8
   install:
     - requirements: docs/requirements.txt
     - method: setuptools
diff --git a/docs/conf.py b/docs/conf.py
index e3eef6b3..6ca6c872 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -23,7 +23,7 @@ copyright = u'2019, The Bitmessage Team'  # pylint: disable=redefined-builtin
 author = u'The Bitmessage Team'
 
 # The short X.Y version
-version = unicode(version.softwareVersion)
+version = version.softwareVersion
 
 # The full version, including alpha/beta/rc tags
 release = version
@@ -46,7 +46,7 @@ extensions = [
     'sphinx.ext.napoleon',
     'sphinx.ext.todo',
     'sphinxcontrib.apidoc',
-    'm2r',
+    'm2r2',
 ]
 
 default_role = 'obj'
@@ -199,13 +199,16 @@ epub_exclude_files = ['search.html']
 # -- Extension configuration -------------------------------------------------
 
 autodoc_mock_imports = [
-    'debug',
     'pybitmessage.bitmessagekivy',
     'pybitmessage.bitmessageqt.foldertree',
+    'pybitmessage.bitmessageqt.tests',
+    'pybitmessage.debug',
+    'pybitmessage.fallback.umsgpack',
     'pybitmessage.helper_startup',
     'pybitmessage.mock',
     'pybitmessage.network.httpd',
     'pybitmessage.network.https',
+    'pybitmessage.pyelliptic.tests',
     'ctypes',
     'dialog',
     'gi',
@@ -268,7 +271,7 @@ def linkcode_resolve(domain, info):
 # -- Options for intersphinx extension ---------------------------------------
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/2.7/': None}
+intersphinx_mapping = {'https://docs.python.org/3/': None}
 
 # -- Options for todo extension ----------------------------------------------
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index a62bf415..4bd6ff2d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-m2r
+m2r2
 sphinxcontrib-apidoc
 docutils<=0.17.1
diff --git a/tox.ini b/tox.ini
index 632c7381..8732af86 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ commands =
     coverage run -a src/bitmessagemain.py -t
     coverage run -a -m tests
 
-[testenv:py27-doc]
+[testenv:doc]
 deps =
     .[docs]
     -r docs/requirements.txt