diff --git a/README.rst b/README.rst
index 807180f..c8f15d3 100644
--- a/README.rst
+++ b/README.rst
@@ -57,7 +57,7 @@ Features
 Documentation
 =============
 
-The full documentation is available at https://overloading.readthedocs.org/.
+The full documentation is available at https://overloading.readthedocs.io/.
 
 
 Installation
diff --git a/docs/conf.py b/docs/conf.py
index e7dda62..2c546c7 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -32,7 +32,7 @@
 _title = 'overloading.py documentation'
 _subtitle = 'Function overloading for Python 3'
 _project_url = 'https://github.com/bintoro/overloading.py'
-_doc_url = 'https://overloading.readthedocs.org'
+_doc_url = 'https://overloading.readthedocs.io'
 
 version = __version__
 release = __version__
diff --git a/docs/index.rst b/docs/index.rst
index 83bdc1f..b65e1c9 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -27,7 +27,7 @@ Notable changes since v0.4
 
 
 .. include:: ../README.rst
-   :start-after: https://overloading.readthedocs.org/.
+   :start-after: https://overloading.readthedocs.io/.
 
 
 Links
diff --git a/overloading.py b/overloading.py
index fb84bd6..1d1af64 100644
--- a/overloading.py
+++ b/overloading.py
@@ -6,7 +6,7 @@
 Function overloading for Python 3
 
 * Project repository: https://github.com/bintoro/overloading.py
-* Documentation: https://overloading.readthedocs.org/
+* Documentation: https://overloading.readthedocs.io/
 
 Copyright © 2014–2016 Kalle Tuure. Released under the MIT License.