diff --git a/pyproject.toml b/pyproject.toml
index 0af83867..f3d94b29 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,13 +38,23 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
+    "ruff",
+    "mypy",
     "pytest",
-    "pytest-xdist",
     "testfixtures",
+    "pytest-xdist",
     "build",
+    "wheel",
     "twine",
-    "mypy",
-    "ruff"
+    "coverage",
+    "python-coveralls",
+    "sphinx",
+    "sphinx-autobuild",
+    "sphinx_rtd_theme",
+    "sphinx-argparse",
+    "recommonmark",
+    "graphviz",
+    "boto3"
 ]
 
 [project.scripts]
diff --git a/requirements.dev.txt b/requirements.dev.txt
deleted file mode 100644
index 04af9271..00000000
--- a/requirements.dev.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-# Packages needed for miniwdl development, in addition to those in
-# requirements.txt which are needed for miniwdl to run in common use.
--r requirements.txt
-sphinx
-sphinx-autobuild
-sphinx_rtd_theme
-graphviz
-coverage
-python-coveralls
-wheel
-pbr
-twine
-testfixtures
-pytest
-pytest-cov
-pytest-xdist
-recommonmark
-sphinx-argparse
-boto3
-mypy
-ruff