diff --git a/requirements-dev.txt b/requirements-dev.txt
index 63d0189..98df1c3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,6 +4,7 @@ hjson
 mike
 mkdocs-git-revision-date-plugin
 mkdocs-material
+mypy
 nose2
 pygments
 semver
diff --git a/requirements-release.txt b/requirements-release.txt
index 580efe0..8e83cec 100644
--- a/requirements-release.txt
+++ b/requirements-release.txt
@@ -1,10 +1,6 @@
 -r requirements-dev.txt
 bumpversion
-flake8
 gitchangelog
 hjson
-nose2
 pydoc-markdown
-semver
 twine
-yapf