diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c17e3b239..f7bea79b0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -46,7 +46,7 @@ locally. You'll need python 3.6 or later, and to install a number of tools:
 
 ```
 # Install the dependencies
-pip install -e ".[lint]"
+pip install -e ".[lint,mypy]"
 
 # Run the linter script
 ./scripts-dev/lint.sh
@@ -63,7 +63,7 @@ run-time:
 ./scripts-dev/lint.sh path/to/file1.py path/to/file2.py path/to/folder
 ```
 
-You can also provided the `-d` option, which will lint the files that have been
+You can also provide the `-d` option, which will lint the files that have been
 changed since the last git commit. This will often be significantly faster than
 linting the whole codebase.
 
diff --git a/changelog.d/8633.misc b/changelog.d/8633.misc
new file mode 100644
index 000000000..8e1d006b3
--- /dev/null
+++ b/changelog.d/8633.misc
@@ -0,0 +1 @@
+Run `mypy` as part of the lint.sh script.
diff --git a/scripts-dev/lint.sh b/scripts-dev/lint.sh
index f2b65a210..f14180551 100755
--- a/scripts-dev/lint.sh
+++ b/scripts-dev/lint.sh
@@ -94,3 +94,4 @@ isort "${files[@]}"
 python3 -m black "${files[@]}"
 ./scripts-dev/config-lint.sh
 flake8 "${files[@]}"
+mypy