diff --git a/pyproject.toml b/pyproject.toml
index 91f055c..87ec6c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ dependencies = [
     "pandas",
     "scipy",
     "readfcs",
+    "pytometry",
     "scikit-learn",
     "python-igraph",
     "session-info",