diff --git a/pyproject.toml b/pyproject.toml
index da0695c357b91b75c35e34ca3bb6878fe21f9a32..0f98466e7e082f0cfcf9934ed3d293375cffdcf7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,6 +3,7 @@ name = "hog"
 version = "0.1"
 dependencies = [
   "islpy",
+  "ndim @ https://github.com/sigma-py/ndim/archive/refs/tags/v0.1.6.tar.gz",
   "numpy==1.24.3",
   "quadpy-gpl==0.16.10",
   "poly-cse-py",
diff --git a/requirements.txt b/requirements.txt
index 75d777c50a55a287d4f9e9a432552bb95f68e07b..2caff95ea34485b863246abbef5cc33a8748e1be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 --extra-index-url https://test.pypi.org/simple/
 
 islpy
+ndim @ https://github.com/sigma-py/ndim/archive/refs/tags/v0.1.6.tar.gz
 numpy==1.24.3
 poly-cse-py
 pystencils @ git+https://i10git.cs.fau.de/hyteg/pystencils.git@4a790e1c48f32c07fc4058de9b20734bcea9cca0