diff --git a/INSTALL b/INSTALL
index d362ab1..ec3c0df 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,9 +1,7 @@
 * Installation
-python -m pip install . --break-system-packages
-# or in 'development mode'
-python -m pip install -e . --break-system-packages
-# or inside a virtual environment using e.g. poetry
-poetry install
+
+python -m pip install .
 
 * Uninstallation
-python -m pip uninstall fvr --break-system-packages
+
+python -m pip uninstall fvr
diff --git a/pyproject.toml b/pyproject.toml
index 5769ccc..dbab372 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,9 @@ classifiers = [
   "Topic :: Scientific/Engineering",
   "Typing :: Typed",
 ]
+dependencies = [
+  "numpy",
+]
 
 [tool.setuptools.dynamic]
 version = {attr = "fvr.__version__"}