diff --git a/noxfile.py b/noxfile.py
index 68328c6..61bdf84 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -32,5 +32,5 @@ def docs(session):
 @nox.session
 def test(session):
     """Run the test suite."""
-    session.install("-e", ".")
+    session.install(".")
     session.run(*(["pytest"] + session.posargs))
diff --git a/setup.py b/setup.py
index 42d5cef..1799775 100644
--- a/setup.py
+++ b/setup.py
@@ -16,6 +16,8 @@
     license="LICENSE.md",
     install_requires=["sphinx>=4.0", "matplotlib"],
     packages=["sphinxext/opengraph"],
+    include_package_data=True,
+    package_data={"sphinxext.opengraph": ["sphinxext/opengraph/_static/*"]},
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Environment :: Plugins",