diff --git a/README.md b/README.md
index c09ff4c..f53a1a1 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ The directory structure of your new project looks like this:
 │   └── visualization  <- Scripts to create exploratory and results oriented visualizations
 │       └── visualize.py
 │
-└── tox.ini            <- tox file with settings for running tox; see tox.testrun.org
+└── tox.ini            <- tox file with settings for running tox; see tox.readthedocs.io
 ```
 
 ## Contributing
diff --git a/docs/docs/index.md b/docs/docs/index.md
index 87a651a..b754711 100644
--- a/docs/docs/index.md
+++ b/docs/docs/index.md
@@ -120,7 +120,7 @@ cookiecutter https://github.com/drivendata/cookiecutter-data-science
 │   └── visualization  <- Scripts to create exploratory and results oriented visualizations
 │       └── visualize.py
 │
-└── tox.ini            <- tox file with settings for running tox; see tox.testrun.org
+└── tox.ini            <- tox file with settings for running tox; see tox.readthedocs.io
 ```
 
 ## Opinions
diff --git a/{{ cookiecutter.repo_name }}/README.md b/{{ cookiecutter.repo_name }}/README.md
index 010dd62..78eb676 100644
--- a/{{ cookiecutter.repo_name }}/README.md	
+++ b/{{ cookiecutter.repo_name }}/README.md	
@@ -49,7 +49,7 @@ Project Organization
     │   └── visualization  <- Scripts to create exploratory and results oriented visualizations
     │       └── visualize.py
     │
-    └── tox.ini            <- tox file with settings for running tox; see tox.testrun.org
+    └── tox.ini            <- tox file with settings for running tox; see tox.readthedocs.io
 
 
 --------