diff --git a/docs/examples.rst b/docs/examples.rst
index 97c52554..ba779362 100644
--- a/docs/examples.rst
+++ b/docs/examples.rst
@@ -216,20 +216,19 @@ Run the following command, where the RES will be saved as the file ``res.png``::
     $ otoole viz res excel simplicity.xlsx res.png config.yaml
 
 .. WARNING::
-    If you encounter a ``graphviz`` dependency error, please install it in your
-    virtual environment through::
-
-        pip install graphviz # if using pip
-        conda install graphviz # if using conda
-
-    Alternatively, you can install it on your system via the commands::
+    If you encounter a ``graphviz`` dependency error, install it on your system
+    from the graphviz_ website (if on Windows) or via the command::
 
         sudo apt install graphviz # if on Ubuntu
         brew install graphviz # if on Mac
 
-    Or from the graphviz_ website if on Windows.
+    To check that ``graphviz`` installed correctly, run ``dot -V`` to check the
+    version::
+
+        ~$ dot -V
+        dot - graphviz version 2.43.0 (0)
 
-2. View the RES
+1. View the RES
 ~~~~~~~~~~~~~~~
 Open the newly created file, ``res.png`` and the following image should be
 displayed
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 0665d857..6b659fb8 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,5 @@
 amply>=0.1.4
 docutils<0.18
-graphviz
 flatten_dict
 Jinja2<3.1
 networkx
diff --git a/setup.cfg b/setup.cfg
index 3f94cc37..7fbcbb43 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -53,7 +53,6 @@ install_requires =
     flatten_dict
     openpyxl
     pydantic>=2
-    graphviz
 [options.packages.find]
 where = src
 exclude =