diff --git a/poetry.lock b/poetry.lock
index 32d27c1c..4c15fba4 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -466,6 +466,19 @@ all = ["Sphinx (>=1.5.1)", "check-manifest (>=0.25)", "coverage (>=4.0)", "isort
 docs = ["Sphinx (>=1.5.1)"]
 tests = ["check-manifest (>=0.25)", "coverage (>=4.0)", "isort (>=4.2.2)", "pydocstyle (>=1.0.0)", "pytest-cache (>=1.0)", "pytest-cov (>=1.8.0)", "pytest-pep8 (>=1.0.6)", "pytest (>=2.8.0)"]
 
+[[package]]
+category = "dev"
+description = "Python interface to your NPM and package.json."
+name = "pynpm"
+optional = false
+python-versions = "*"
+version = "0.1.2"
+
+[package.extras]
+all = ["Sphinx (>=1.5.1)", "check-manifest (>=0.25)", "coverage (>=4.0)", "isort (>=4.2.2)", "pydocstyle (>=1.0.0)", "pytest-cache (>=1.0)", "pytest-cov (>=1.8.0)", "pytest-pep8 (>=1.0.6)", "pytest (>=2.8.0)"]
+docs = ["Sphinx (>=1.5.1)"]
+tests = ["check-manifest (>=0.25)", "coverage (>=4.0)", "isort (>=4.2.2)", "pydocstyle (>=1.0.0)", "pytest-cache (>=1.0)", "pytest-cov (>=1.8.0)", "pytest-pep8 (>=1.0.6)", "pytest (>=2.8.0)"]
+
 [[package]]
 category = "dev"
 description = "Python parsing module"
diff --git a/pyproject.toml b/pyproject.toml
index 3d4df63d..51e726a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,6 +56,7 @@ rpi = ["RPi.GPIO"]
 build_static = 'openflexure_microscope.install:build'
 
 [tool.poetry.dev-dependencies]
+pynpm = "^0.1.2"
 sphinxcontrib-httpdomain = "^1.7"
 rope = "^0.14.0"
 pylint = "^2.3"