requirements_dev -> requirements-dev
diff --git a/Makefile b/Makefile
index 7399eb3..646b7e3 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@
tox $(REBUILD_FLAG)
-.venv.touch: setup.py requirements.txt requirements_dev.txt
+.venv.touch: setup.py requirements.txt requirements-dev.txt
$(eval REBUILD_FLAG := --recreate)
touch .venv.touch
diff --git a/requirements_dev.txt b/requirements-dev.txt
similarity index 100%
rename from requirements_dev.txt
rename to requirements-dev.txt
diff --git a/tox.ini b/tox.ini
index dbdcaec..4b043ba 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@
[testenv]
install_command = pip install --use-wheel {opts} {packages}
-deps = -rrequirements_dev.txt
+deps = -rrequirements-dev.txt
commands =
coverage erase
coverage run -m pytest {posargs:tests}
