diff --git a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,7 @@ dependencies = [
     "webcolors>=1.11.1",
     "rdfdb @ https://projects.bigasterisk.com/rdfdb/rdfdb-0.24.0.tar.gz",
     "scipy>=1.9.3",
+    "braillegraph>=0.6",
 ]
 requires-python = ">=3.10"